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

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

Apartment complexes built into huge repurposed natural gas tanks.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

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

Op-art architecture designed for happiness.

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

A spherical "micro-nation" in the heart of Vienna.

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

The topiary maze at the Habsburg hunting lodge.

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

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

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

This quaint Hungarian railway system is operated exclusively by children between the ages of 10 and 14.

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

A raised boardwalk winds through a thicket of stunted, century-old trees no more than nine feet tall.

A drab two-story office space in Delaware is a hidden tax haven for Hillary Clinton, Donald Trump, and over half the Fortune 500 companies.

The highest point in Delaware is located under a trailer so this marker across the street will have to do.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

This recreation of a 19th-century dime museum is full of oddities.

This mountaintop beacon is only lit three times a year but shines like some kind of all-seeing eye.

Cows on a ranch are commonplace, scattered cow bones everywhere? Not so much.

Thousands of turbines whir at at the origin of North American wind power.