Iceland's largest geothermal mud pool is a little bit haunted and a little bit dangerous.

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

Thanks to an acoustic anomaly, this unassuming stone bench has heard one hundred years of secrets.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

Northern Ireland's Brobdingnagian stepping stones.

This ancient Hindu temple is covered in thousands of colorful statues and has a long mythological history.

A collection of crumbling mansions stand as a reminder of a more prosperous time in this Indian village.

A complex of six forts embedded in the Rajasthan hills.

This otherworldly palace-mausoleum complex is the stuff eternal dreams are made of.

This abandoned fort is said to be the most haunted place in India, so much so that entry is prohibited after sunset.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

Sacred Indian temple that’s all monkey business.

An extraordinary "City of Caves" carved from solid stone.

The remains of what was, not so long ago, the world's largest city.

This complex of vertically-excavated Buddhist, Jain, and Hindu monolithic temples in India's Maharashtra providence illustrates a spirit of tolerance characteristic of ancient India.

Despite its name, this route in southern Utah offers a heavenly day trip.

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

Once a menacing challenge for trailblazers, this trail is now the most scenic drive in Utah.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

Giant pinnacles in the sun-scorched lands of Southern Utah have been nicknamed "white ghosts."

Outsider Art Community.

The remains of this hell for leather wild west town can still be found in the Arizona desert.

Rather than a run-of-the-mill franchise hotel, this lodging has been decked out in dinosaur decor.

A century-old cabin off of Highway 30 touts an unusual construction material: dinosaur bones.