This off-beat, quirky communism-themed bar isn't afraid to poke fun at its history.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

Also known as the Blue Church, the building was consecrated to the daughter of Andrew II.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

A Byzantine-era church hidden in a wooded area below the Acropolis.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

Come for the flowers, stay for the bats!

Commonly acknowledged as the only public monument to the Devil himself.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Standing atop 2nd-century Roman ruins, this church is one of the oldest and most iconic in Old Cairo.

An exquisite Baroque church in Vienna's old town.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

Floating swimming pool within a moored vessel.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The most visited, and possibly most controversial, museum in Germany.

The celebrated eyesore created by starry-eyed sweethearts.

A majestic lion statue guards this Parisian botanical garden, and feeds on an unsettling item.

A semi-scholarly approach to sex.

Elevated freight railway turned wildly successful urban park.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

Staten Island's original central park is the former home of the city water supply as well as thousands of immigrant graves.

What remains of the summer palace of King Kamehameha III.