File:Canuelo-2.jpg

English: en:El Cañuelo, Isla de Cabras, Puerto Rico en:Historic American Buildings Survey, en:Frederik C. Gjessing Photographer April 19, 1954 DETAIL OF SENTRY BOX AND EMBRASURES, NORTHEAST CORNER. (HABS, PR,7-SAJU,11-5)

English: A bartizan, an overhanging turret built on the side of a fort or castle. A bartizan projects out of the side of a 90 degree wall.