Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

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

In Tucson a giant metal snake helps pedestrians cross a busy highway.

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

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Ecuador's largest Incan ruins show evidence of sophisticated irrigation and diplomacy among the ancient builders.

Massive volcano in the Andes is the farthest point from earth's center.

A turquoise lake within a volcanic crater.

The meteor that sealed the fate of the dinosaurs landed at this site, one of the largest impact craters in the world.

A gargantuan crystal kingdom.

Send a postcard while vacationing with Satan.

A glowing underwater cliff attracts marine life and divers in equal measure.

This beautiful eden was once the vacation home of Tahitian royals before Marlon Brando bought it.

This WWII plane died a quiet death, and is now a garden eel playground.

A once-glowing grotto at the bottom of Waikapalae Wet Cave.

Watch the newest land on the planet form before your eyes.

A prehistoric landscape hidden in the cliffs of Maha'ulepu.

A beach made of semi-precious green sand on the Big Island of Hawai'i.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

A Hawaiian stairway to heaven—that you can't climb.

A tunnel of hardened lava along Maui’s famous Road to Hana.

A son's promise to his dying father in the form of a covered bridge filled with thousands of seashells.

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

A mysterious spot where the laws of gravity seem not to apply.