This unique wooden mosque resembling a Chinese pagoda was said to be built without the use of nails.

The Greek War of Independence was declared at this medieval Byzantine sanctuary.

Its tremendous toad is actually a five-story museum and viewing platform.

Sited in an Inner Mongolian desert are the remnants of an important trade stop along the Silk Road.

Mysterious heaps of stones dot these otherworldly woods.

This beautiful 16th-century necropolis marks an astonishing feat in heritage conservation.

Its collection offers a glimpse into the Russian Old Believers' centuries-old way of life.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

This popular cave pool is truly magical, despite the crowds.

It commemorates one of the world's earliest telegraphs.

A medieval church built into an ancient cave.

A beautiful Greco-Roman structure houses a well once believed to have healing powers.

Frozen in Norway, vended in Singapore.

The surviving remnants of a destroyed medieval church now stand in a public park.

The only pub in the world surrounded by an ancient stone circle.

Its history includes dinosaur fossils, cattle rustlers, Georgia O'Keeffe, and a mythical giant rattlesnake named Vivaron.

An island graveyard with spectacular views of the Caribbean.

These otherworldly caverns form Earth's oldest known cave system.

This subterranean spot might be the epitome of Japan's baroque, retro coffee houses.

The ruins of a pre-Columbian fortress city so secure it held off the Spanish conquistadors for over 20 years.

This retro underwater observation tower would make the perfect lair for a sea-loving villain.

Nine bronze hands protruding from a wall honor the student uprising that led to the fall of Czechoslovakia's Communist government.

This lesser-known geographic marker was the reference point for all surveys of the continent for 75 years.

This 15th-century aqueduct with distinctive pointed arches was used for irrigation in the Vinalopó valley.