Today, the principal entrances are Sway Hole and Steam Hole, with two smaller connected entrances named Meeks Hole and Fox Hole. Both main shafts are shallow rectangular pits, suitable for free climbing; Sway Hole is easier when using a 25-foot ladder secured to a nearby tree. Sway Hole drops steeply before opening into the dramatic Quarter Mile Churn—an impressive, 20-foot-wide passage that runs level for several hundred yards before sloping down and narrowing. A complex and poorly marked route leads to lower levels, featuring a steep incline, awkward drops, and even sections that require wading. These lower, evenly cut tunnels reflect 19th-century mining methods and contrast with the irregular upper workings.

Route-finding is notoriously difficult, and anyone attempting a through-trip from Sway Hole to Steam Hole is strongly advised to go with someone who knows the mine well. Notable features include a winch, ore chutes, and a flooded shaft. In 1991, large previously unknown ore bodies were discovered in the lower tunnels via climbs up ore chutes—these contain unmined ore but are accessible only through unstable boulder chokes.

Likely opened around 1861, Wigpool Iron Mine reached its peak production in the late 19th century, employing 200 men and yielding approximately 4,000 tons of iron ore per year. The main shaft was eventually sunk to a depth of 528 feet but encountered a significant water feeder that curtailed deeper working. Columbus Shaft, located about 500 yards to the north-northeast, was sunk earlier to a similar depth, with two levels driven at 345 and 378 feet. Both shafts have since been obliterated. The mine closed in 1918, and is geologically and historically linked to the nearby Bailey Level

The Sway Hole entrance is identifiable as a shallow shaft under tree cover and serves as the recommended entry point. Steam Hole, the usual exit for through-trips, lies to the south.

All entrances are now gated. Permission from Clearwell Caves