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, including 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 four tours a day (at least one in English) by reservation only (call several days ahead). A gift shop sells coffee beans and other souvenirs. Allow an hour to drive the winding road from Ponce.