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.
10/18/19 | 3m 22s
5/30/25 | 5m
9/6/19 | 2m 53s
6/6/19 | 53s
6/28/19 | 4m 24s
7/24/21 | 12m 27s
10/30/19 | 1m 43s
8/21/25 | 6m 58s
