Urban exploration

exploration of usually hidden or abandoned structures

series of linked subterranean spaces

thumb|A climber ascends the Doran Memorial Bridge using [[aid climbing techniques]]

network of connected buildings in Montreal

Cataphiles are urban explorers who illegally tour the Mines of Paris, a term popularly used to describe a series of tunnels that were built as a network of stone mines, which are no longer used. The Catacombs of Paris comprise a subset of this network.

US television program

residential building complex in Warsaw, Poland

Previously inhabited areas reclaimed by vegetation and wildlife

thumb|A rooftopper on top of the Zürich Hauptbahnhof railway station in Switzerland|alt=A person sits on the ledge of a building looking down at the street below thumb|thumbtime=1:49|Buildering and rooftopping on a cable-stayed bridge in Kyiv, Ukraine

ruins of architecture constructed in the recent past

underground organization

building