Torre del Oro (English: Tower of Gold) is a watchtower built in 1221 to guard the Guadalquivir river in Seville. Probably its name refers to his golden glow reflected on the river. Today it houses the Naval Museum of the city.
Seville owes its fortune to the river that runs through it, the Río Guadalquivir. The river is navigable from Seville to its mouth on the Atlantic Ocean. After the discovery of America, the river harbor of Seville was considered the safest port to bring the riches from the New World, beginning its Golden Age.