I asked my friend Mike to lead a trip to the Clarksville Cave in NY and today, we ventured over to it (about 2 hours west of us). An expedition of 6 took on the fun challenge, and all survived!
Visit this site for more info on the Clarksville Cave.
" Clarksville cave is a popular horizontal cave in Albany County, NY. With about 4800 feet of passage and three entrances, Clarksville is surely the best-known and most-visited wild cave in the Northeast.
The cave is open from 7AM to 11PM to the general public. The preserve includes a changing area and informational kiosk."