Penn's Caves is America's only all-water cavern and wildlife park and is nestled in Central Pennsylvania's scenic Penn State Country. It is about 20 miles from Penn State University, close to the town of Center Hall. The formations inside the cave are mind boggling. Thousands if not millions of stalgtites and stalagmites are forever forming within the cave. The boat tour is an hour long and be sure to ask for Dave from the Cave as your tour guide.

For more pictures ... http://www.pbase.com/yardbird/usa_pa_pennscave