Caballo Island (which means in Spanish: Horse island) is a bluff, rocky island located at the entrance to Manila Bay in the Philippines. It is about 3/4 mile long with the highest elevation at 381 feet high. Caballo, along with the larger Corregidor (2 km to the north), divides the entrance to the bay into two broad and deep channels, known as the North and South Channel. The whole island was formerly occupied by Fort Hughes, a U.S. defense fortification before World War II. It was heavily bombed before and after the war.