If you do a little exploring, you'll find that this is the term for the recreational exploring of caves
If that's on your 2012 agenda, here are the logistics you'll need to know 
to obtain... [DOC] [TLE] The Underground Railroad on the Shawnee ... - Recreation.gov [PAR] Recreation.gov - Explore your America ... Not far from Miller Grove, you'll find 
Crow Knob, a high sandstone bluff allegedly used as a look-out and Sand Cave
,... [DOC] [TLE] Caving - Wikipedia [PAR] Caving  also traditionally known as spelunking in the United States and 
Canada and potholing in the United Kingdom and Ireland  is the recreational 
pastime of exploring wild (generally non-commercial) cave systems.