Take a journey underground with Nittany Grotto Inc., a group dedicated to preserving and exploring caves. Witness how they navigate tight passages, expansive domes, and muddy terrain, revealing the hidden beauty of the subterranean world.
12/4/20 | 5m 28s
2/21/19 | 2m 21s
7/31/21 | 2m 51s
5/24/19 | 2m 42s
7/24/21 | 12m 27s
9/6/19 | 1m 42s
7/9/21 | 3m 33s
8/6/21 | 3m 10s
