Hollowed out cedar log tubs set in an ancient towering forest.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

A sculpture for the sun and stars, created by Nancy Holt.

Semi-recognized center of the world, with many oddities.

An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

Bridges, terraces, and replicas of historic structures all built of rock and petrified wood by one man.

This golf ball–shaped former desert real estate office now houses a UFO museum.

This historic tower in the California desert promises visitors a "vortex of good vibes".

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

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

The ghost town that ended up on Ebay.

An eclectic trailer park retreat in the middle of the California desert.

An artist's vision for connectivity spans seven continents and 16 countries.

Michael Heizer's masterwork in the Nevada Basin.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

Treehouse motel and treehouse-building school.

A former utopian healing center created by a huckster and built by derelicts.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

Mexican food and folk art.

Costumed elves and mountain bikers co-exist peacefully at this abandoned Christmas-themed adventure park.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

Canyon walls shrouded in ferns.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.