One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

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

A beautiful geyser under environmental threat.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Monasteries on rock pillars, once accessible only by frayed ropes.

A serpentine highway twists and turns over the treacherous Norwegian Sea.

The final resting place of New Orleans' most famous voodoo priestess.

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

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

Odd outsider art installations surround a Gold Rush-era ghost town.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

Stroll through a wonderland of stupendous moss-covered trees.

Rising from the sea like a stone monster.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

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

America's most famous piece of self-built architecture.

Northern Ireland's Brobdingnagian stepping stones.

Elevated freight railway turned wildly successful urban park.

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

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

A submerged archeological park still holds the wonders of a Roman Sodom.

Famously misunderstood wonder of the ancient world

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.