A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

Legends surround an ancient tree trunk riddled with nails for good luck.

Baroque celebration of the end of the Great Plague of Vienna.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

On a winding Vienna side street, one museum has turned their windows into a monument to history’s peace-minded heroes.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

A relic of the Cold War tucked away in the forested hills above Bratislava.

Thousands of slain Soviet soldiers are buried within the shadow of this enormous obelisk.

The inverted pyramid design of this station stands out amid Bratislava's urban landscape.

A massive sculpture of an obscure Celtic coin that has become a symbol in Slovakia.

The largest fountain in Bratislava.

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

Launched by Napoleon's soldiers more than 200 years ago, a cannonball remains embedded in the tower wall.

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.

The Swiss hilltop housed an early 20th-century vegetarian nudist colony.

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

This pirate-broadcasting-tower-turned-restaurant played a rebellious role in the history of Dutch television.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

Amsterdam's Red Light District leaves little to the imagination.

The world's shortest funicular ferries beachgoers a whopping 128 feet from clifftop to shore.

This concrete monster of a wreck lies in the mouth of Langstone Harbour as a monument to the incredible history of D-Day.

Nature puts on a spectacular show at this blowhole on the eastern side of Gran Canaria.