Fortress of the Immaculate Conception, El Castillo

The Fortress of the Immaculate Conception, is a fortification located on the southern bank of the San Juan River, in the village of El Castillo in southern Nicaragua. The fortress is situated approximately 6 kilometers from the border with Costa Rica, at the Raudal del Diablo rapids of the San Juan River. It was completed in 1675 as part of a series of fortifications along the San Juan River, to defend against pirate attacks upon the city of Granada. The settlement of El Castillo and its fortress continued to be strategically important to the Captaincy General of Guatemala until the late 18th century. ()