When you're a great Russian Tsar, even your vomit gets a statue.

The bridge is a secret gallery of discarded gum that has been transformed into miniature masterpieces.

A saintly relic hidden in a Prague church basement.

Now home to a drinking establishment, this building has a macabre history.

Neon artworks light up this dark Edinburgh tunnel.

Visit the remains of a notorious Victorian-era correctional facility.

Not quite the menace it once was, this monster still has some chops.

Colloquially known as “piss alley,” this narrow street filled with tiny bars and barbecue stands looks like it was pulled straight out of “Blade Runner.”

These unique toilets feature transparent glass covered in PDLC film.

A fascinating insight into daily life in the Eastern Bloc.

One of the largest numismatic collections in Europe fell victim to a huge theft.

A memorial in the Tiergarten is a reminder of the suffering inflicted on homosexuals by the Nazi regime.

The site where a plot to assassinate Hitler was planned—and its conspirators were executed—is now a powerful memorial to the German resistance during World War II.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

The commemorative stone column conceals a secret laboratory.

This chimerical bridge/tunnel appears to dead end right into the sea.

This statue honors the thousands of Allied avians that served and died for France during World War I.

Somber memorial to the May 10, 1933, book-burning which took place on this spot.

Carved fountains poignantly placed in parks and in front of special monuments.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

The lesser-known Alice sculpture of Central Park dedicated to the “godmother of American children.”

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Designed to illustrate two parts of the human psyche.