A mesmerizing landscape of 18th-century cellars carved out of the land.

The tunnel's elegant proportions keep you snug with no claustrophobia freak-out.

One man's personal collection of KGB memorabilia is presented along with his strange viewpoint.

A sculpture of the iconic East German car on four legs is a tribute to those who traveled to Prague seeking asylum.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

The summer tourists on these cliffs are thousands of seabirds.

A small but immensely extravagant palace built by the "Night King."

The fairy tale castle of the "fairy-tale king."

Inat Kuća, or "House of Spite," is more than just an oddly named restaurant.

The place where World War I began.

Oriental bazaar in the heart of Sarajevo.

This historic timepiece is thought to be the only public clock in the world that keeps lunar time.

A number of craters left by fatal mortar strikes have been filled with red resin to remember those lost during the Siege of Sarajevo.

The world's largest fire hydrant is supposedly tornado-proof.

This psychedelic tromp l'oeil seems to be beckoning drivers to crash into a wall.

This titanic steel chain linking two buildings was installed without permission but instantly beloved.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

Scattered around Atlanta are little doors with big charm.

Electrical pylon in the shape of Disney's beloved mouse.

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

This underfoot portrait is the work of a disgruntled painter inspired by a tragic poem.

Travel through the wholesome amusements of yesteryear at this charming miniature village.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.