Long Binh Jail
Đồng Nai, Vietnam
Long Binh Jail (commonly called LBJ, the "LBJ Ranch", or Long Binh Stockade) was a U.S. military stockade located at Long Binh Post, in Đồng Nai Province, South Vietnam during the Vietnam War. 90% of the prisoners in the jail were African Americans. The handshake known as the "dap" was created here.
Prison data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).