Arecibo Observatory, which is in Puerto Rico, is the location of the world's largest single-dish radio telescope. Because radio telescopes can work at all times of day and in all kinds of weather, the observatory operates 24 hours a day. It celebrated its 50th anniversary of work in 2013. Update for Sept. 20, 2017: The Arecibo Observatory is currently closed due to Hurricane Maria in Puerto Rico. While the observatory does a lot of astronomy work, it is perhaps most famous for being the site of the huge Search for Extra Terrestrial Intelligence (SETI) message directed at the globular cluster M13 in 1974. Besides its scientific work, Arecibo is known for being the location of a climactic fight in "Goldeneye," a 1995 James Bond film starring Pierce Brosnan.
Read More: Space.com