An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

Strange rock formations tower above the river that snakes through this enchanting Icelandic canyon.

This extraordinary geological oddity resembles human-made pavement.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

Thousands of migrating monarchs overwinter clustered amongst the eucalyptus trees.

A partial tunnel blasted into a steep ridge is all that remains of a failed railway across Arizona.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

One artist's love letter to his city and its citizens plays out across dozens of bright murals painted on the sides of decrepit buildings.

Rare recess caves fill this unbelievably beautiful Ohio park.

The scuba diving training facility was named for the steam that rises from the cave's chimney.

A meditative space out of a fantasy story.

This dormant volcanic crater has been converted from a roiling pit of magma to a pleasant hiking spot.

In this roadside "community for the small," abandoned toys gain new lives.

The Neolithic megalith was one of the first archaeological ruins protected by the British government.

The last resting place of the famous Native American princess is marked by a haunting monument.

Mysterious 500-year-old tapestries depict a unicorn hunt.

The famous author's cottage hideaway.

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

The oldest Dutch colonial stone house in New York City is a hidden gem on the border of Brooklyn and Queens.

This staircase in a lush tropical grotto was built by enslaved laborers and renamed to honor Queen Victoria's role in ending slavery in the British Empire.

Before becoming a public park, this spot was a shell midden, a fort, and an amusement park.