look up any word, like bae:
 
1.
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.
by Digby February 26, 2003
 
2.
exploring sewer and drain systems in the city
"let me borrow your flashlight, man, we're going urban spelunking"
by Andrew Giminiani April 30, 2003