Castillo de San Pedro del Morro (Morro Castle)
Castillo de San Pedro del Morro © Rodger Evans
Santiago's most impressive structure is poised ominously atop the cliffs at the narrow entrance to Santiago Bay. This enormous piece of military architecture, a maze of stairways and dungeons, was begun in 1640 and originally built to defend the bay from pirates and naval attack. It now houses the Museum of Piracy, featuring fascinating displays on piracy, colonialism and slavery, as well as old blunderbusses, muskets, cutlasses and Toledo blades in glass cases. The castle is one of the best-preserved 17th-century Spanish fortresses in the world and it has been declared a UNESCO World Heritage Site.
Address: Six miles (10 km) southwest of the city centre, near the bay