Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

Roman ruins top white travertine terraces formed by ancient hot springs.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

Rising from the sea like a stone monster.

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

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

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

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

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

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

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

A picture-perfect town, perfect for blowing up.

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

Northern Ireland's Brobdingnagian stepping stones.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

The world's brightest bioluminescent bay.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

A 30-acre garden inspired by the principles of modern physics.

An ethereal glowing blue ocean cave in Croatia.

Fine dining in the bizarre world of Lewis Carroll.

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