urban spelunking

The act of breaking into and exploring large abandoned buildings in a city.

I got a ticket from the cops when they caught me urban spelunking in the old train station.

urban spelunking by Digby February 26, 2003

urban spelunking

exploring sewer and drain systems in the city

"let me borrow your flashlight, man, we're going urban spelunking"

urban spelunking by Andrew Giminiani April 30, 2003