Spend an afternoon exploring Ponce, the island’s second-largest metropolitan area. Here, you’ll find the historic Parque de Bombas – a firehouse turned museum — Ponce’s town square, Plaza Las Delicias, plus an array of coffee shops, more museums, bars and restaurants. After you’re finished enjoying the sights, head next door to Castillo Serrallés, where you can tour the 1930s Spanish Revival-style estate built by the owners of the Don Q rum distillery (and try some of the delicious spirit, obviously).