Castillo Serrallés (English: Serralles Castle) is a mansion located in the city of Ponce, Puerto Rico, overlooking the downtown area (Ponce Pueblo). It was built during the 1930s for Juan Eugenio Serrallés, son of businessman Juan Serrallés, founder of Destilería Serrallés. The structure sits on a 2.5-acre (1.0 ha) exceedingly manicured property. Nowadays, the structure functions as a museum, Museo Castillo Serrallés, with information about the sugar cane and rum industries and its impact in the economy of Puerto Rico. It is also increasingly used as a venue for social activities, including destination weddings. The property was listed in the National Register of Historic Places in 1980.