This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Fort San Cristbal guerite San Juan Puerto Rico. Devil's watchtower bartizan at fort San Cristbal in Old San Juan Puerto Rico seen from the uppernorthern side of the fort Garitta del Diavolo nel forte San Cristbal nella Vecchia San Juan Porto Rico vista dalla zona superiore lato nord del forte Garita del Diablo en el fuerte San Cristobal