Hacienda Buena Vista
Built by Salvador de Vives in 1838, this was one of the area's largest coffee plantations. It's a technological marvel: water from the nearby Río Canas was funneled into narrow brick channels that could be diverted to perform any number of tasks, like turning the waterwheel. (Seeing the two-story wheel slowly begin to turn is fascinating, especially for kids.) Nearby is the two-story manor house, with a kitchen dominated by a massive hearth and furniture that hints at life on a coffee plantation nearly 150 years ago. In 1987, the plantation was restored by the Puerto Rican Conservation Trust, which leads several tours each day (at least one in English; by reservation only, call several days in advance or reserve online). A gift shop sells coffee beans and other souvenirs. Allow an hour's drive on the winding road from Ponce.