2026 update: This glossary has been expanded with newer urbex terms around security technology, drone scouting, demolition watch, planning research, site condition and heritage risk.

Picture this: you’re sneaking through a derelict old hospital, and your mate whispers, “Hold up, there’s an armadillo by the door.” No, it’s not a real animal. In urban exploration slang, an armadillo means a mobile security camera that talks. Urban exploration, or urbex for short, has developed its own quirky language, and it can sound pretty bizarre to newcomers.

If you’re new to the hobby, urbex is all about exploring abandoned and off-limits places for fun, photography, and the thrill of discovery. And like any close-knit community, urban explorers have invented loads of slang and shorthand. It might feel like a secret code at first, but don’t worry, we’ve got a cheat sheet for you.

Below you’ll find a fun glossary of urbex lingo from A to Z. From “bando” to “secca”, these terms will help you understand what fellow explorers are talking about.

Use this glossary as a quick reference rather than a strict rulebook. Urbex slang changes by country, region and community, so some terms are more common in UK and Ireland circles than elsewhere. We’ve included classic explorer slang alongside practical terms for safety, security, planning, site condition and abandoned building research.

Talk the Talk: Urbex Slang from A to Z

Abandoned: A building or site that’s been left empty and neglected. These places are the bread and butter of urbex adventures.

Access / Access Point: How an explorer gets into a site. It could be an open door, a busted window, or a hole in the fence – any sneaky way inside is an access point.

Active Site: A building, yard or facility that is still in use, even if parts of it look abandoned. Active sites carry a much higher risk of trespass issues, security response and accidental confrontation.

Anti-climb Paint: Thick, greasy paint used on walls, fences, drainpipes and rooftops to stop people climbing. It can stain clothing, damage gear and usually means the site owner is actively trying to prevent access.

Armadillo: A mobile, remotely operated security camera (often with a loudspeaker). If you trigger an armadillo, it will blare a warning message (usually telling you the police have been notified and you should leave ASAP).

Asbestos: A dangerous material used in many older buildings (especially in insulation). Disturbing asbestos can release toxic fibres, so it’s a big reason to wear a mask or PPE in old structures.

Asylum: An abandoned psychiatric hospital or mental institution. Explorers often shorthand these spooky, historic hospitals as “asylums.” They’re popular urbex spots with lots of backstory.

Backstory: The history or background of an abandoned location. Every place has a backstory – the who, what, when, and why of how it ended up abandoned.

Bando: Slang for an abandoned building. It’s basically “abandoned” without the first part. (Example: “We found a cool bando on the outskirts of town.”)

Boarded/Bricked: Describes an entry point that’s been sealed up. If a door or window you intended to use is suddenly covered by boards or bricks, that access has been “boarded” or “bricked” (meaning it’s no longer a way in).

Brownfield: Land that has previously been developed, often for industrial or commercial use, and is now vacant, derelict or awaiting redevelopment.

Buildering: Climbing a building’s exterior to gain access or just for the challenge – like urban rock climbing. The word is a mash-up of building and bouldering. (Not for the faint of heart or those afraid of heights!)

Capsule: Shorthand for a “time capsule” location – a place frozen in time with personal belongings still there, as if the owners just vanished. Walk into a capsule and you might find beds still made, plates on the table, and clothes in the wardrobe.

Cataphile: An explorer who specializes in catacombs (underground tunnel systems, like those beneath Paris). Cataphiles know their way through maze-like tunnels and often seek out hidden underground worlds.

Cooldown: A period of time after security, police, workers or locals have noticed activity at a site. Explorers might say a location needs to “cool down” before anyone goes near it again.

Decay: The natural deterioration of abandoned sites over time. Peeling paint, rusted metal, collapsing floors – explorers often find beauty in all that decay as nature slowly reclaims man-made structures.

Demo Watch: Keeping an eye on a site that is due for demolition. This often involves checking planning portals, fencing changes, scaffolding, machinery and local news.

Drainer: An urban explorer who loves storm drains, sewers, and other water tunnels under the city. Drainers will gladly wade through ankle-deep water (or worse) to explore underground passages most people never see.

Drone Recce: Using a drone to check the outside of a site, roof condition, access routes or nearby activity before visiting. This should only be done where drone flying is legal and safe.

Explorer’s Code: The unwritten ethical rules that responsible urbexers follow. For example, the classic motto “take nothing but photos, leave nothing but footprints” is part of the explorer’s code. It means you shouldn’t vandalise or steal from places – just enjoy and document them.

Fly-tipping: Illegal dumping of rubbish, furniture, tyres or building waste. Fly-tipping is common around abandoned places and can make a site more hazardous.

Freshie: A newly discovered abandoned location. A freshie is like a fresh find – not many (if any) explorers have been there yet. Discovering a freshie is like finding hidden treasure in the urbex world.

Geocaching: A separate hobby that some urbexers dabble in. It’s a GPS treasure hunt where you find hidden containers (“caches”) using coordinates. Occasionally, caches are hidden in or near abandoned sites, blending a bit with urban exploration.

Ghost Town: A town or village that’s been completely abandoned by its residents. Think of Pripyat near Chernobyl or old Wild West mining towns – once full of life, now eerie and empty. Ghost towns are the ultimate large-scale abandoned locations.

Graff: Short for graffiti. You’ll often see spray-painted tags, murals, or street art in abandoned buildings. Explorers call it graff for short. Love it or hate it, graff is a common sight on urbex outings.

Heritage Crime: Crimes that damage historical or culturally important sites. Smashing up a listed building, stealing artifacts from a castle, or setting fire to a historic church – all would be considered heritage crime. It’s taken seriously by authorities (and despised by respectful explorers).

High-Vis: Short for high-visibility gear. This refers to those bright neon reflective vests or jackets. Funny enough, wearing high-vis is a trick some urbexers use – dress like a construction worker or security, and you might blend in and slip into a site without drawing attention.

Holy Grail: An urban explorer’s dream location – the one amazing site that is super hard to access and highly coveted. Every explorer has their own “holy grail,” whether it’s an abandoned luxury mansion, a defunct theme park, or a hidden underground facility they’ve always wanted to see.

Infiltration: Sneaking into a building that is not abandoned (i.e. an active, in-use site) without permission. Think of it as urbex on hard mode – it requires more stealth because people (and possibly active security) are on the premises.

Live Site: Another term for an active site. It might look empty from the outside, but still have workers, alarms, utilities, cameras or security patrols.

Mothballed: A building or site that has been closed but not completely abandoned. It may be kept secure, maintained at a basic level, or held for future reuse.

Ninja Entrance: A very discreet, sneaky way to enter a location without being seen. A ninja entrance might be a hidden side door, a climb through a dark back window, or simply timing your entry perfectly when no one’s watching. It’s all about stealth.

Nocturnal: Doing an exploration at night. Some urbexers are nocturnal by nature – they prefer exploring under the cover of darkness, which can help avoid security and adds to the spooky ambiance of a location.

OSINT: Short for open-source intelligence. In urbex, this means using publicly available information such as old maps, planning records, company filings, news articles and satellite imagery to research a location.

Perimeter Check: Walking around the outside of a site to understand fencing, cameras, access points, nearby houses, roads and general risk before deciding what to do next.

Permission Visit: An urbex trip where you actually got permission from the owner to explore the site. It’s legal and above-board – no fence hopping or sneaking in required. (Sometimes museums or preservation societies will allow these kind of visits to certain sites.)

PIR Sensor: A passive infrared motion sensor, often used in alarms and temporary security systems. These can detect movement inside buildings, yards or compounds.

Planning Portal: A council or government website where planning applications, demolition notices, redevelopment plans and heritage documents can often be found.

POE (Point of Entry): Shorthand for your way into a site, used interchangeably with “access point.” For example, “Found a POE around the back by a broken drainpipe” means you discovered a place to get in. Knowing the POE is key to any successful explore.

PPE (Personal Protective Equipment): Safety gear like helmets, gloves, boots, and respirator masks. Smart explorers pack PPE to protect themselves from hazards like asbestos, mould, weak floors, or falling debris. It might not look cool in photos, but it can be a lifesaver.

PTZ Camera: A pan-tilt-zoom CCTV camera that can move and zoom remotely. PTZ cameras are more active than fixed cameras and are often used on higher-risk sites.

Recce: Short for reconnaissance. To “do a recce” means to scout a location in advance. Before a big explore, an urbexer might do a quick recce of the site – checking for security patrols, cameras, or the best entry points – and come back later prepared to go in.

Revisit: Returning to a location months or years after a previous explore to document changes, decay, demolition progress or restoration work.

Roof Topping: Climbing to the top of tall structures (buildings, cranes, bridges, etc.) to enjoy the view or take photos. Roof topping is popular in cities – those daring climbers you see in YouTube videos scaling skyscrapers are doing exactly this. It’s an adrenaline rush, but also very risky (and often illegal).

Rurex: A blend of “rural” and “exploration.” Rurex means exploring abandoned places out in the countryside instead of in cities. It could be a deserted farmhouse, a remote ghost village, or an old barn in the middle of nowhere. Same thrill of urbex, just with more cows and fewer pedestrians around.

Scrappers: Thieves who break into abandoned buildings to steal scrap metal and other valuables. They’ll rip out copper wiring, pipes, appliances – anything they can sell. Scrappers are the bane of urbexers because they destroy sites and often leave them in far worse shape (or trigger alarms and increased security).

Sealed: A location where access points have been blocked, welded, boarded, bricked up or fenced off. A sealed site may still exist, but is no longer realistically accessible.

Secca: Slang for security guards or security in general. If someone on an explore whispers “Secca!” it’s a warning that security is nearby. Time to hide or make yourself scarce! The word likely comes from shortening “security” to sec and adding a casual “-a.” (It’s a common term in UK urbex circles.)

Sketchy: Describes a location that feels unsafe or dodgy. Maybe the floors are rotten, the building is on the verge of collapse, or the neighborhood is rough – anything that gives bad vibes or poses danger. If an explorer says a site is sketchy, use extra caution (or consider giving it a miss)

Snow: Urbex slang for suspected loose asbestos, white fibrous dust, broken insulation or powdery debris inside an abandoned building. If someone says “there’s snow in there”, treat it as a serious asbestos warning and avoid disturbing it..

Soft Strip: The stage before demolition where fixtures, fittings, wiring, ceilings, partitions and internal materials are removed from a building.

Soggy House: Exactly what it sounds like – a house that’s been ruined by water damage, usually from a leaky roof or flooding. Inside a soggy house you’ll find lots of damp, mould, and decay. These places are often structurally unsound and usually don’t have anything interesting left to find (aside from mushrooms growing in the carpet).

Splore: Short for “explore.” It’s a cutesy way to refer to an urbex trip. For example, “Off for a splore this weekend” just means you’re heading out to explore some locations. Not a technical term, just urbex slang playing with the word explore.

Squatter: A person living in an abandoned property without the owner’s permission. Squatters move in and make it their home (at least temporarily). They’re not urbexers, but you might run into squatters in some locations. (If you do, be respectful – it’s their home, after all.)

Squib / Squibbed: Some explorers use this for a site that has been badly trashed, stripped, burned or ruined since earlier visits. I’d only include this if you know your audience uses it.

SSSI: Stands for Site of Special Scientific Interest. In the UK, this label is given to protected areas of particular scientific or natural importance (sometimes historical importance too). If an abandoned site is part of an SSSI, it means it’s legally protected – exploring there is not just trespassing, it could get you in serious trouble for disturbing a protected site.

Tagging: The act of spray-painting your tag (personal graffiti signature) on a surface. Tagging is common in abandoned places, but it’s generally discouraged by urbexers who want to preserve the site. Finding old graffiti is one thing; leaving your own tag is considered poor form in the community.

Time Capsule: An abandoned place that’s essentially preserved in time, with its contents untouched for years. Walking into a good time capsule spot feels like stepping back decades – you might find furniture, photos, calendars, and items all left exactly as they were. (It’s the kind of site every explorer loves to stumble upon.)

Tour Bus: A tongue-in-cheek term for a location that’s become too popular among explorers. If every explorer and their dog has been to a particular abandoned building, and people are constantly coming through in groups, it turns into a “tour bus” location. In other words, it’s an urbex hotspot that’s lost its secrecy – almost like it has scheduled tours!

Trespass: The act of entering someone else’s property without permission. In many cases urbex involves civil trespass (a legal term in the UK for a non-violent, non-destructive intrusion). It’s usually a minor offense, but getting caught can still mean warnings, fines, or being removed by police. Urbexers take trespassing seriously – the goal is to explore without getting into legal trouble.

Tripod Hole: A jokey term for a spot that’s been photographed to death. Imagine so many photographers have set up their tripods in the same place that they’ve practically worn a hole in the floor – that’s a “tripod hole.” In short, it’s an extremely well-known location or angle. If someone says a photo is from a tripod hole, it implies the shot is a bit cliché because everyone takes that same shot.

Tunnelling: Exploring tunnels of any kind, from abandoned train tunnels to utility tunnels under a city. It’s a branch of urbex that deals with the underground world. Tunnelling can overlap with draining if water tunnels are involved, but also includes dry tunnels like old mines, secret government tunnels, or crypts. Bring a torch (flashlight) and maybe a map – it’s easy to get lost down there!

UE: Short for urban exploration. Instead of saying the whole term, people often just use the abbreviation “UE” in forums and conversations. (Same with calling it urbex – it’s just quicker to say.)

Urbexer: An urban explorer – i.e. someone who does urbex. If you climb through broken windows for fun, photograph abandoned places, or swap explore stories on weekend meetups, congratulations: you’re an urbexer!

Water Ingress: Rainwater or groundwater entering a building through damaged roofs, blocked drains, broken windows or failed walls. It often leads to mould, rot, collapsed floors and structural problems.

Welded: An access point that has been sealed shut with metalwork. Often used for doors, shutters, gates and hatches on higher-security sites.

Did we miss any slang?

Urban exploration lingo is always evolving, and different regions have their own terms. If you know a cool urbex term that isn’t in this list, let us know – we’re always happy to learn (and we might update the glossary accordingly).

If you’re itching to start your own urbex adventures, be sure to check out our other guides to help you out:

Stay safe out there, and happy exploring!