17th century streets hidden under Edinburgh were once a breeding ground for the black death.

360° views of the city plus five floors of optical illusions and hands-on science.

A 18th century graveyard and its astonishing cortege of macabre iconography.

Medicinal spa created with the discharge from a geothermal energy plant.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

An encyclopedic collection of mammal penises.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

A museum dedicated to the history and exploration of both popular music and science fiction.

This Elizabethan hedge maze is one of only six in North America.

Traditional 15th century Chinese garden in the middle of Vancouver.

This expansive bridge in the Canadian wilderness was originally just built for friends.

A church of bones, decorated with 40,000 human skeletons.

A snapshot of the city's fascinating voodoo culture.

The second oldest continuously operating bar in Louisiana.

The curiosities and wonders of pharmacy in a delightful historic building.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Official museum, hall of fame, and repository of the Texas Rangers.

Housed in a century-old building, this museum's dedicated not just to soft drinks, but to the free enterprise system.

A store full of vintage and indie toys designed to bring out the kid in even the crustiest of adults.

Controversially claiming the title of world's biggest bass drum, UT's Big Bertha was once made radioactive by the Manhattan Project.

One part antique store, one part curiosities hodge-podge.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.