If you do a little exploring, you'll find that this is the term for the recreational exploring of caves
[DOC] [TLE] Things to Know Before You Go Spelunking : Outdoors and ... [PAR] This increasingly popular recreational activity has you explore caves or grottos, 
as you ... With spelunking you never know what you'll find around each corner 
while being guided ... First, know your limits: While spelunking is an invigorating 
sport, if you're ...