People with approved DoD IDs are allowed to enter Fort Sill and visit Adams Hill. Civilians must seek permission from the Fort Sill Visitor Center.
Adams Hill, situated at an elevation of 1214 feet, is a unique place to visit because of its tar pit. It may look like a regular pond, but if you look at the edges, you can see the tar and smell the tar. The tar here has been used for centuries by native people and settlers. Today, the tar pit is an attraction with an information plaque and is left alone.