Beginning cavers and spelunkers are severely discouraged from entering and negotiating the cave. Caves are found around the island, offering spelunkers a glimpse of delicate underground formations. There are also numerous caves within this wilderness, accessible to prepared spelunkers. Spelunkers report areas of flowstone and a few stalactites. The caves have long passages and mostly small open areas which are accessible to spelunkers. Pettyjohn Cave is a very popular cave for local students and spelunkers. Subway buffs and urban spelunkers knew about it. Similar reports among spelunkers led to experimental demonstration in animals. Knots can save spelunkers from being buried under rock.