Hell's Half Acre, five miles west of the Powder River on Hwys 20/26, is a highly eerie example of nature. Sometimes called the Baby Grand Canyon, this 320-acre depression with brightly colored and grotesque rock formations surrounding it also contains towers and spires deep in the canyon, caused by erosion. These formations are also pastel colored, which make an eerie contrast in light of the shadowy, menacing tower-like structures that are sometimes very boldly colored. Indian artifacts and fossils have been found in this region. An observation point is available for viewing the canyon May through November, free of charge. Located in Natrona County.