This automated sculpture of two men peeing will spell out text messages with their micturition.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

A Jenga-style cylindrical tower of books that appears to go on forever.

A surreal statue honoring Prague's favorite literary son.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Monument to a suicide protesting the Soviet invasion.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

A mocking tribute to the past and modern leadership of Prague.

This spooky statue sits outside a famous Prague theater.

Macabre astrological automaton clock dating to the late 1400s.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

One man's unrequited love stands in a glass box forever.

The first rural cemetery west of the Mississippi is home to the elaborate tombs of St. Louis' local beer barons.

A beloved tribute to the Fab Four and the freedoms they inspired.

Established hundreds of years ago, Gandan remains the premier Buddhist monastery in Ulaanbaatar.

Since the 1700s, this old barrel has acted as a post box that relies on the kindness of travelers.

These mammoth-yet-narrow crevasses in the Earth are perfect for taking an otherworldly swim.

An exhibition devoted to the life (and posthumous taxidermy form) of the last known representative of the Pinta Island Tortoises.

An eerie reminder to the horrors of World War II.

A commemoration of over 150 of St. Louis's favorite sons and daughters.