Arecibo Observatory
It's listed on the American National Register of Historic Places. It's also known as the National Astronomy and Ionosphere Center. And it's the world's largest single-aperture telescope. But you probably know it as "that huge-ass hidden dish in GoldenEye". And yes, while the Arecibo Observatory was the backdrop for 007 and 006's climactic battle, in the real world, its a center of research into radio astronomy, aeronomy, and radar astronomy. Measuring 1,000 feet in diameter, the Arecibo has been used for everything from determining the rotation rate of Mercury and discovering the first binary pulsar to sending out — and listening for — communications from extraterrestrial life. And there's a visitor center, too, thankfully free of hellbent ex-MI6 agents.
