An ornate private entrance to the Vienna subway built specifically for the emperor.

The house that took a plunge into the facade of a museum.

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

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

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.

The most confusing clock in New York.

In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

An oasis of calm amid the chaos of the boardwalk, the museum traces the heritage of this beloved beachside amusement park.

A bit of retro transportation flair preserved in the world's largest department store.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

In this Parisian garden's grotesque former life as a zoo it fed exotic animals to the bourgeois and put humans on exhibit.

Tables of secondhand books fill the inner courtyard of this 17th-century stock exchange.

A monument to the thousands of Canadian soldiers who died capturing the French ridge during World War I.

The world's largest reflecting pool is just two centimeters deep.

A medieval church with largest and oldest collection of Renaissance frescoes in France.

Historic medieval fortified city in southwest France.

A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

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

One of only two commuter aerial tramways in the United States.