 A square-mile section of that land was released to the state in 1897 which became Wyoming's first state park, known as Big Horn Hot Springs State Reserve.The park features a managed herd of bison, a suspension foot bridge across the Big Horn River, picnic shelters, boat docks, flower gardens, and terraces made of naturally forming travertine (calcium carbonate) caused by a flowing mineral hot spring.The park area encompasses commercial hotels and several state-run and privately operated entities including the Gottsche Rehabilitation Center, Hot Springs County Memorial Hospital, the historic Callaghan Apartments/Plaza Hotel, the Star Plunge waterpark, the Tepee Pools waterpark, and the Wyoming Pioneer Home, a state-run, assisted-living facility.