The Arecibo Observatory in Puerto Rico is operated by Cornell University. It is
one of the most powerful radar-radio telescopes and the largest single unit telescope in the world. It collects radio astronomy, terrestrial aeronomy, and planetary radar data for scientists around the world. The Arecibo Observatory is powerful enough to receive signals transmitted by a comparable telescope located 1,000 light-years away. The telescope was featured in the movies GoldenEye (1995) and Contact (1997). Tour duration: 7 hrs.