Among the wildlife of the park are deer, bobcats, raccoon, squirrels, beaver and otters, as well as turkey, blue heron and barred owls.

[5] The first map of the system was completed by the National Speleological Society team leader, Sheck Exley, in 1995.

[7] In 2010, a connection was made by Agnes Milowka and James Toland between Baptizing and Peacock springs, extending the total length of the system an additional 10,000 feet (3,000 m).

[9] It is one of the largest underwater caves in the continental United States with over 38,000 feet (12,000 m) of explored passageway.

Each of these three tunnels has a permanent guideline (called a gold line) placed in it to ease navigation by cave divers.

Olsen is a small inline sinkhole approximately 1,500 feet (460 m) from Peacock I down the Pothole tunnel.

To prevent erosion, cave divers are no longer permitted to enter at Olsen sink as of 2002, although it remains a popular place to temporarily surface during a dive.

The tunnel extends outside Peacock Spring State Park to Challenge Sink.

It offers a very small, silty entrance to the cave system, and is usually covered in a thick layer of duckweed.

Peacock III is a siphon, meaning it takes in water rather than discharging it, as a spring would.

The system is very low, silty, and shallow, except for one room, Henley's Castle, which drops to depths of over 200 feet (61 m).