A devastated ruin in the south of Belize where British explorers claimed to unearth the Mitchell-Hedges Crystal Skull.

A long strip of fossil-filled limestone makes up this natural bridge above a rushing stream.

A history of tragedy and a pile of eerie stories have contributed to this house's consistent ranking as one of the most haunted places in Ohio.

Unusual building appears to be haphazardly built from randomly piled bricks.

This unassuming alcove in London’s famous Tower Bridge once served to capture, store, and display dead bodies from the River Thames.

The mass grave of the 27 victims of the "Vampire of Hanover."

Striking occult iconography on a medieval German church.

This niche museum devoted to ancient religious artifacts is shaped like the very thing it displays.

This spectacular bridge supported by two gigantic hands looks like something out of a fantasy universe.

Tucked away in the Leiden city hall are a group of works by famed artist MC Escher.

Home to the world's largest quilt collection dating from the 1600s through today.

This bizarre hotel on historic Route 66 has been plagued by rumors of paranormal activity.

This former cannon foundry and castle for the Counts of Flanders is now a public garden.

A series of caves, tunnels, and wells filled with fascinating figures and symbols.

Baked in 1898 and still almost flawless, this floral masterpiece is considered the world's oldest complete wedding cake.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

Described as one of the Baltic region’s most daring and original construction projects.

At this ancient settlement at the foot of Mount Babadağ, honeycomb tombs are carved into a round cliff.

A 2,000-year-old engineering wonder hides beneath an Italian town.

Ride a boat through this magnificent underground world, which now doubles as a theater.

A network of underground water channels that dates back to the Middle Ages.

There has been an astronomical clock on this spot since the 14th century.

This fascinating museum in an old water tower holds the world's largest collection of Vodou artifacts from western and central Africa.

Nine caves filled with recently-discovered archaeological finds under the houses and the streets of the most ancient district of an old town.