Home to the deepest rift anywhere on Earth.

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

The world's longest known cave system.

In this relatively flat state the highest point is an honored place.

An office built to look like a giant basket.

The only presidential monument to display a late POTUS's actual casket.

The largest ancient burial mound in Ohio.

The inventor of a number of hybrid corn species is immortalized with a field of giant corn.

The largest earthwork effigy in the world.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

A unique geological area spiked with wind-carved rocks that resemble teepees.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

A museum dedicated to the alleged Roswell Incident.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

A whimsical monument marks the highest point in Kansas, not that you could tell by the looks of it.

A wooden hut from the Heroic Age of Antarctic Exploration.

Scientists use one of the saltiest bodies of water on Earth as a terrestrial base for studying water on Mars.

Largest sub-glacial lake ever discovered.

One of the most extreme deserts in the world, these snow-free valleys harbor life, despite the hostile environment.

Nimrod Polar Expedition base, and home to hundred-year-old frozen whisky.

Antarctica's bustling metropolis, originally established by Richard E. Byrd.

Natural time capsule containing an alien ecosystem.