The 1888 Jail in Hot Springs is believed to be the oldest wooden jail in existence in South Dakota - and possibly in all 50 states. Constructed around 1888, this unique building is listed on the National Register of Historic Places and is a must-see for anyone visiting the area. It is located on the 600 block of North River Street, next to the Hot Springs Visitors Center. The jail is built entirely of pine 2×4 lumber that were laid flat and nailed together on top of each other. Approximately 500 2x4s were used to construct the jail - including all four walls, the floor, and the roof. Cedar shingles were likely used to cover the pitched roof. In order to discourage anyone from sawing through the wood to make an escape, #9-gauge wire was placed between the layers of wood for added security. Metal bars were used to cover the windows. read more