U.S. Naval Base Subic Bay
Naval Base Subic Bay was a major ship-repair, supply, and rest and recreation facility of the Spanish Navy and, subsequently, the United States Navy located in Olongapo City, Philippines. The base was 262 square miles (680 km2) – about the size of Singapore.
Source: Wikipedia — U.S. Naval Base Subic Bay (CC BY-SA 4.0)