A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

Washington's top-secret Cold War-era doomsday communications tower is located in a small neighborhood park.

This mighty white oak in Bethesda survived both the American Revolution and the construction of Washington D.C.'s metro red line.

Concerned residents saved this historic house and garden from demolition.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

A whimsical sensor instrument for Minneapolitans to play on their walks to work.

After the musical legend's death, his memorial was mysteriously graffitied in gold.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

The celebrated eyesore created by starry-eyed sweethearts.

This mural painted by Keith Haring was done without payment as a gift to entertain the children at the Hôpital Necker.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

According to a local legend, this old castle could only be built after a woman was immured in the walls.

There's a mini version of Iguazu Falls hidden in the Balkans, and it's got a rope swing.

A former bank seized as a sniper vantage point during the Bosnian War is now a secret graffiti art gallery.

Bridge that died in war and was resurected.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

A wonderfully strange collection of 500+ stuffed frogs doing people things.

An ethereal glowing blue ocean cave in Croatia.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

A tiny church on a man-made island in the Adriatic.

A curious cave church carved into the face of a cliff.

A curious little museum dedicated to the furry feline in the cat haven that is Old Town Kotor.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.