On the ocean side of Castillo de San Cristobal sits a lonely guard house. Built in 1634 this sentry box was avoided by many. It was rumored that some of the soldiers that spent the night in the "garita" were never seen again. As a result it became known as "La Garita Del Diablo", The devil's Sentry Box.
The area is off limits to tourists, but it can be seen from the fort as well as the city walls along the water.