The first city Europeans founded in the Americas, in 1496, and it still beats. You walk along cobblestone streets once trodden by Diego Columbus and Hernán Cortés, between the Cathedral Primada —the oldest on the continent— and the Alcázar de Colón. By day it's living history; by night, the terraces of the Colonial Zone fill with music and people. A World Heritage Site where every stone holds five centuries of stories.