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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
12 1
 
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
7 7