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

Off-limits and full of venomous pit vipers, Brazil’s Snake Island has a frighteningly apt nickname.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

This collection of Neolithic monuments make up one of The U.K.'s richest archeological landscapes.

This Neolithic-era complex boasts standing stones, a cairn, and the only henge in Western Scotland.

Legend says a witch conjured the world's third largest whirlpool to protect Scotland from a nasty pirate.

Looking strangely like Rome's Colosseum, this unfinished tower has dominated the skyline for over 100 years.

The "Bridge Over the Atlantic" lets you cross the waterway in mere seconds.

This remote Colorado canyon is home to the second-largest collection of natural arches in the world.

See 150 million-year-old dinosaur tracks and bones dating back to the Jurassic period.

Colorado's only active volcano last erupted around 4,000 years ago.

A glimpse of a waterfall is reached by a steel catwalk along a slot canyon located in an Ouray city park.

Located in the world's highest-altitude Dark Sky Community, this observatory welcomes amateur and professional astronomers alike.

At the tallest peak in Colorado, an electrifying mix of thin air, lightning, and rivalry.

This once-popular otherworldly landscape was formed by one of the largest volcanic eruptions in history.

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

When ecosystems collide in the arid Southwest.

This Colorado hiking trail provides a small gold mine of abandoned gold mines.

The highest bridge in America was built for an almost unnervingly small amount of money.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

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

A dangerous narrow-gauge railroad once traced a route through this striking canyon.