Celebrating 90 Years of Discovery and Family-Friendly Fun Since 1930! Where science and adventure are NATURALLY FUN! One-hour interpretive tours of two spectacular crystal caverns. Educational programs, Black Light Adventures, Raystown Rocks Gift Shop, gem panning, primitive camping. Great family events…October Ghosts & Goblins Tours, December Santa in the Cave, February Batfest, March Easter Bunny Underground, National Caves & Karst Day with TEN for PENN in June, June Discovery Days, and weekly Summer Events too! Closest Cavern to Raystown Lake.