Fuerte de San Sebastián del Pastelillo Cartagena

This fort, on the western end of Manga Island, was constructed in the middle of the 16th century as one of the town's first defense posts. It's quite small and not particularly inspiring, but it's close to the Old Town – just across the bridge from Getsemaní. Today the fort is home to the Club de Pesca, which has a marina where local and foreign boats anchor.