The island nation of Guam is located at approximately 13 degrees north latitude and 144 east longitude. The unincorporated U.S. territory occupies roughly 212 square miles in the western Pacific Ocean.
The largest and southernmost island of the Marianas archipelago, Guam is roughly 6,000 miles west of San Francisco and 3,700 miles southwest of Honolulu. To the southeast of Guam lies the Mariana Trench, which contains the deepest known depth of the ocean.
The island was first explored by Portuguese navigator Ferdinand Magellan in 1521. In modern times, the economy of the island is centered around tourism and military spending. As of 2013, U.S. Navy and Air Force operations occupy over 30 percent of the land on Guam.