Take a walking tour through Old San Juan first — one of the oldest walled cities in North America. Weave among the pastel-hued buildings and 16th-century landmarks, the little plazas and cathedrals before spending an hour or so at the forts: El Morro and San Cristóbal. The blue cobblestone San Juan streets were made to last — from iron slag, brought over as ballast on European ships during the 18th century. Sofrito Tours can show you all the sights.
The hip Santurce neighbourhood is home to both the Museum of Art of Puerto Rico and the Museum of Contemporary Art. This is also where you can take The Art Walk PR, an engaging tour past the many murals around Calle Cerra. Across San Juan Bay, the landmark Casa Bacardi rum distillery delivers tours, tastings and mixology classes.