Hacienda "Santa Elena" - Credit: Wikimedia Commons
Hacienda Santa Elena is a 500-acre historic sugarcane plantation located in the west bank of La Plata River in the Media Luna area of the municipality of Toa Baja, Puerto Rico. Santa Elena is recognized as a historic monument by the Institute of Puerto Rican Culture (ICP) since 1983, and it was added to the United States National Register of Historic Places in 1992 as it is the only existing 18th-century industrial complex not only in Puerto Rico but also the Caribbean, in addition to being the oldest existing sugar mill of its kind in the Western Hemisphere. Read more on Wikipedia
Source: en.wikipedia.org