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Observation Tower
U.S. National Register of Historic Places
Torre de Piedra, 2018
Location	Caín Alto, San Germán, Puerto Rico
Coordinates	18°08′40″N 66°58′48″W / 18.14444°N 66.98000°W / 18.14444; -66.98000
Built	1940
Architect	Civilian Conservation Corps
Architectural style	Bungalow/Craftsman
NRHP reference No.	16000236
Added to NRHP	May 1, 2016

The Santa Ana Observation Tower (Spanish: Torre de observación de Santa Ana), better known as the Stone Tower (La Torre de Piedra), is an approximately 30 feet tall observation tower located at the summit of Monte del Estado, Santa Ana Peak, at the boundary between the municipalities of San Germán and Maricao, within the Maricao State Forest in southwestern Puerto Rico.

The tower was built in 1940 by the Civilian Conservation Corps, who were also responsible for the building of trails, camps and infrastructure in other parks such as El Yunque and Toro Negro. It was added to the National Register of Historic Places in 2016 along with other properties across Puerto Rico under the listing of New Deal Era (1931–1942) Constructions in the Forest Reserves of Puerto Rico.

References

1. ^ "HIJOS DE MARICAO". HIJOS DE MARICAO. Retrieved 2022-07-09.
2. "Mindat.org". www.mindat.org. Retrieved 2022-07-09.
3. ^ National Park Service, NPGallery Digital Asset Management System. "National Register of Historic Places Registration Form for Observation Tower".

v t e National Register of Historic Places in San Germán, Puerto Rico
Historic district	San Germán Historic District
Other properties	Jaime Acosta y Fores Residence Alcantarilla Pluvial sobre la Quebrada Manzanares Casa de los Ponce de Leon Church San Germán Auxerre of San Germán Convento de Porta Coeli Hacienda Buena Union Observation Tower
See also: National Register of Historic Places listings in San Germán, Puerto Rico and List of National Historic Landmarks in Puerto Rico

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• 1940 establishments in Puerto Rico
• Buildings and structures in San Germán, Puerto Rico
• Buildings and structures on the National Register of Historic Places in Puerto Rico
• Tourist attractions in Puerto Rico
• Maricao, Puerto Rico
• Observation towers on the National Register of Historic Places
• Towers completed in 1940
• Civilian Conservation Corps in Puerto Rico
• American Craftsman architecture in Puerto Rico
• Puerto Rico Registered Historic Place stubs