An 80-foot high dead-end chimney which extends out of the Madison limestone and into the Minnelusa beds above the cave. It may be an excavated (1935) paleofilled vertical shaft like the Two Cent Stope.  Originally climbed by Bill Buckingham and William Plummer as part of the 1959 NSS Wind Cave Expedition. Later surveyed by Lester Lewis, Dave Springhetti and Mark Stock