Fodor's Expert Review Museo Castillo Serrallés

This lovely Spanish-style villa—so massive that townspeople dubbed it a castle—was built in the 1930s for Ponce's wealthiest family, the makers of Don Q rum. Guided tours provide a glimpse into the lifestyle of a sugar baron, and a permanent exhibit explains the area's sugarcane and rum industries. Highlights include the dining room, with original hand-carved furnishings, and the extensive garden, with sculptured bushes and a shimmering reflection pool. A large cross looming over the house is an observatory; from the top, you can see the Caribbean.