Fort San Jose is located in Guam

Fort San Jose is a former Spanish fortification on the island of Guam, now a United States territory. The fort was built about 1802 under the administration of Governor Blanco. Details of the fort's structure are not known, as it has been ruins since the 1850s. It is located north of the village of Umatac, on a hill over looking both Fouha Bay and Umatac Bay, the place were Spanish galleons traveling between Manila in the Spanish Philippines and Acapulco, Mexico stopped for water and supplies. The surviving foundational elements of the fort shape a wide semicircle, whose walls were about 2 feet (0.61 m) thick at the base, and now rise in places to a height of 4 feet (1.2 m). The remains of a watchtower stands 36 feet (11 m) southeast of the fort; its surviving walls rise to a height of about 5 feet (1.5 m).

• http://en.wikipedia.org/wiki/Fort San Jose