Bateria Santa Isabel is a historic military fortress located in the San Juan district of Las Palmas de Gran Canaria, built from 1897 onwards as a defensive response to invasion threats during the late 19th century. This extensive installation features underground galleries, semi-cylindrical casements, ramps, and platforms originally equipped with artillery positions and machine gun nests. The complex reached peak activity during World War II and is catalogued as part of Las Palmas' architectural heritage, though much of the site now stands in ruins awaiting rehabilitation efforts.