jeffmitchell2010:
Indian Caverns
jeffmitchell2010:
Flowstone
jeffmitchell2010:
Artifacts found in the cave
jeffmitchell2010:
Artifacts found in the cave
jeffmitchell2010:
Glowing zinc sulfide deposits
jeffmitchell2010:
Arch Spring, PA's only natural bridge
jeffmitchell2010:
Sign at Tytoona Cave parking
jeffmitchell2010:
Rules at Tytoona Cave
jeffmitchell2010:
Tytoona Cave
jeffmitchell2010:
Inside the cave
jeffmitchell2010:
Dark and deep
jeffmitchell2010:
Fort Roberdeau
jeffmitchell2010:
Cabins for soldiers and officers
