The three-story building, which was built by the Spanish army in 1854 on three acres of land and can accommodate more than 1,000 soldiers and their families, is one of the largest and most impressive buildings built by the Spanish royal family in the Americas. Its interior courtyard is large (not to be missed!) and it is one of the best examples of 19th century Spanish architecture, with some nice cafes and shops around. The second floor is the Museum of the Americas of Las Americas, with three permanent collections, focusing on African heritage, Native American and American popular art; in addition, the museum hosts an annual temporary art exhibition.