A lush desert oasis in the shape of a narrow crescent.

One of the most accessible undersea plane wrecks in the world.

The first declared National Monument in the United States.

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

A waterfall 600 ft. inside a mountain, once the bane of gold miners, is now a spectacle of nature.

The one-time stronghold of the noble Douglas family, now home to ghost sightings and nesting birds.

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

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

This expansive bridge in the Canadian wilderness was originally just built for friends.

An obscure waterfall that looks like something out of a fantasy novel.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

The unique ecosystem atop an Australian mountain is home to some colorful inhabitants.

These azure waters were thought to lead to the Mayan Underworld.

An ethereal glowing blue ocean cave in Croatia.

An ancient city exhumed from the depths of the ocean.

Remote Honduran Islands with a colorful history.

Where an entire elephant skeleton, a snakeskin table runner, and thousands of animal remains become art.

An Australian lake whose pink hue defies scientific explanation.

Every autumn, this hillside is ablaze with red summer cypress.

A wonder of natural limestone formations etched by millions of years of natural interaction between rainfall and rock and air.

An island in the middle of a lake, in the middle of a volcano, in the middle of a bigger lake, in the middle of a bigger island, in an archipelago, in the Pacific Ocean.

World War II bunker still standing on the New Jersey beach.

More gold than anywhere else, ever.

Sniff the Titan Arum's rotting flesh.