This area is for folks who appreciate nature and geology, or are simply looking for a breathtaking view. The 1.5 billion year-old Precambrian rock outcrops on Hughes Mountain are among the oldest exposed rocks in the United States. A rhyolite formation, known locally as the Devil's Honeycomb, is one of Missouri's geologic wonders; it is the highest point on Hughes Mountain. A short hike takes you there–be sure to take your camera. Two-thirds of the area is wooded. The area features glades, which are natural openings on western or southern slopes dominated by native grasses and wildflowers. Animals often found on these glades include fence lizards, collared lizards, lichen grasshoppers and prairie warblers. Hughes Mountain Natural Area is 11 miles south of Potosi on Route 21, then five miles east on Route M; the parking lot is on south side of road, 200 yards east of Cedar Creek Road (CR 541).