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.
12/20/18 | 2m 32s
2/7/19 | 1m 21s
8/15/20 | 3m 25s
3/17/22 | 2m 34s
10/17/23 | 2m 37s
4/17/20 | 46s
2/7/25 | 1m 8s
5/24/23 | 6m 17s
