Posters - PR Culture - The huge Arecibo Radio Telescope.
The largest radio telescope in the world is the Arecibo telescope in Arecibo, Puerto Rico
A great place to visit for anybody in PR or tourist. Camuy caves are too in the region.
Rio Tanama is also well known.
It was built in top of a huge collapsed cave in the mogotes.
It is so large - it is visible from the top peak far away - Cerro de Puntas in Jayuya.
The Arecibo Observatory is a radio telescope in the municipality of Arecibo, Puerto Rico. This observatory is operated by University of Central Florida, Yang Enterprises and UMET, under cooperative agreement with the US National Science Foundation. Wikipedia