Driving around the Presidio in San Francisco...
"The Presidio was originally a Spanish fort sited by Juan Bautista de Anza on March 28, 1776, built by a party led by José Joaquín Moraga later that year. In 1783, the Presidio's garrison numbered only 33 men. Upon Mexican independence from Spain in 1821, it was briefly operated as a Mexican fortification. "