A railway bridge leading nowhere stands lonely in the middle of a meadow.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

This remarkable museum sprung from one of the most important prehistoric archaeological sites in the world.

Living towers made of people that are now recognized by UNESCO.

A celebration of solstice followed by a fiery purging of evils.

During an annual Catholic feast in this tiny Spanish village, men dressed as devils leap over rows of babies to cleanse them of sin.

This "flat geyser" bubbles up out of the ground periodically like a disappearing river.

An ancient Roman theatre restored to its former glory in the Spanish city of Cartegena.

Visit a surreal landscape so otherworldly NASA actually used it to train the Apollo 17 crew.

The oldest Roman lighthouse still in use.

A medieval village holds a very modern hotel.

This ancient Spanish castle sits high upon a hilltop.

"Alleys of Stone" form natural mazes in Spanish natural park.

The chefs at El Diablo use heat generated by an active volcano to cook the food.

The world's largest wooden structure.

Stunning Roman aqueduct used for 1900 years and still standing.

Partially collapsed lava tube and cave system complete with concert hall, underground pond, and unique albino crabs.

Abandoned Nazi train station turned underground astroparticle laboratory.

Considered the birthplace of the Copper Age and Bronze Age, the river is tinted red from 5,000 years of mining.

This awesome Spanish castle is so fantastical it was actually used on Game of Thrones.

Bacteria and algae give the salty water its bubblegum hue.

A landscape decorated with enormous skull sculptures.

Haunting monument to the German Jewish philosopher who died while fleeing fascism.

Religious dwelling in a Spanish volcano.