Arecibo Observatory: The World's Largest Radio Telescope in Puerto Rico

Known affectionately as 'El Radar' by Puerto Ricans, the Arecibo Observatory stands as the world's largest radio telescope. Nestled in a dramatic karst landscape, its massive saucer-shaped dish and towering antennas evoke scenes from the James Bond film GoldenEye (1995).
Spanning 20 acres in a natural sinkhole surrounded by haystack-like mogotes (limestone monoliths), this SRI International-operated facility serves as Earth's ear to the cosmos. Supported by 50-story cables totaling over 600 tons, it contributes to the SETI program and has enabled discoveries like pulsars, quasars—the 'music of the stars'—plus observations of Mercury, the first asteroid images, and the first exoplanets.
Leading scientists worldwide conduct cutting-edge research here. Visitors enjoy an informative center with interactive displays, an educational film, and a prime viewing platform offering panoramic vistas reminiscent of 007.
Access via Highways 635 and 625 off Highway 129; it's just 9 miles south of Arecibo town.




