Hacienda Buena Unión in the municipality of San Germán, Puerto Rico was built in 1870. It is also known as Trapiche del Guamá or Hacienda Acosta..

The hacienda was listed on the U.S. National Register of Historic Places in 1983 and on the Puerto Rico Register of Historic Sites and Zones in 2000..

See also National Register of Historic Places listings in San Germán, Puerto Rico

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