High in the Big Horn Mountains at nearly 10,000 feet above sea level, the Medicine Wheel is a place of worship, a National Historic Site, and an archeological mystery. It is believed that between A.D. 1200 and A.D. 1700, hundreds of limestone rocks were placed in the shape of a wheel roughly 80 feet in diameter. Twenty-eight spokes radiate from a central cairn to six smaller cairns around the rim. No one knows for sure who built it or why, but Native American beliefs and archeological evidence point to its use as a spiritual site. Many people still come to the Medicine Wheel and Medicine Mountain for inspiration, solitude, meditation and vision questing. The Medicine Wheel was given protection and nominated to the National Register by local Big Horn communities, and the site is protected by federal antiquity laws under administration of the Forest Service.