An abandoned network of military bunkers and tunnels open for anyone willing to descend into the darkness.

The cardinal directions, set in stone.

Perhaps the world's only gas station inspired by a political scandal.

A brief journey through early 19th-century pioneer life across Linn County.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

An extraordinary mixture of natural beauty and man-made phenomena.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

A French chateau, failed utopian community, odd museum, and Stonehenge replica in rural Washington State.

One of the largest, oldest, darkest, quietest motel rooms in the world.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

The remains of a boarding school designed to forcibly assimilate Native American children.

Las Vegas's very own 40-foot-tall fire-spewing praying mantis.

This huge dam across the Colorado River caused an armed standoff between two U.S. states.

In the middle of the desert, miles from any human life, sat an anomalous pay phone that still magically answers your calls.

Don't blink or you'll miss it.

A mining town once rife with murderous disputes over its copious treasures now creates income as a popular spot for photo shoots.

A secret fresh water spring for animals and humans alike hidden along the most famous road in the United States.

Thousands of glyphs created by an unknown culture decorate the rock formations of this canyon.

The second oldest continuously operating bar in Louisiana.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.