Nature's biggest mammal swims in landlocked Oklahoma.

In the middle of a suburban Denver neighborhood is a cave that once provided solace for a prominent Ute chief and his family.

Colorado's only true geyser is hidden within the San Juan National Forest.

This deserted Gold Rush town is home to a Masonic lodge that, strangely enough, still holds meetings.

A collection of over 15,000 zines works to preserve DIY publishing culture.

The clock that sets them all.

One woman's UFO-themed campground, complete with self-built energy vortexes, UFO-themed weddings, and magic bushes.

When ecosystems collide in the arid Southwest.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

A creepy steel gremlin has protected the Bay Bridge since 1989.

Along the historic Mother Road is an old gas station with a secret counterfeiting past.

The only diamond mine in the world where you can keep what you find.

The remains of the first public diamond mine in Arkansas.

This underwater old Texas hill town only resurfaces during harsh drought.

Visitors can walk over the largest concentration of Columbian mammoths to have died from one event.

Decaying military base deactivated in the 70s is now visited by urban explorers and military enthusiasts.

Tracks near this Texas nature site were once thought to support the Creationist belief that man and dino coexisted.

A Texas-sized particle collider that was abandoned due to its Texas-sized budget.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

San Antonio's first 3-D stereoscopic mural is a trippy treat for the eyes.

The only international border marker within the United States.

A grove of colossal man-made flowers built to collect the sun's rays.

A mysterious and terrifying public art goblin seemingly meant to inspire local legend.

A mysterious light of unknown origin on the backroads of Missouri.