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

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

A magical, macabre wax museum, beloved by locals, uses real artifacts to depict an assassination from the French Revolution.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

Noirish green neon marks the location of one of the oldest private detective agencies in France.

A lone cannonball remains lodged in the walls of the Hotel de Sens as a sober reminder of a revolution.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

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

A local farm's collection of unusual structures from a now defunct storybook amusement park.

Remnants of a storybook amusement park hidden behind a strip mall.

This free, take-a-book shop seems like a trick but isn't.

The likeness of the Baltimore music icon was unveiled in time for the anniversary of his Senate hearings on music censorship.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

It’s not hard to see why the historic Peabody Conservatory of Music’s library has been described as a “cathedral of books.”

Once America's tallest structure, now a Baltimore landmark.

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

The former home of a mad diplomat is said to still be marked in bloody, arcane scrawls.

A floating cat sanctuary on an Amsterdam canal.

The attic of a four-century-old canal house hides a clandestine church.

Cat art as far as the eye can see.

A Dutch clog company in the town of Zaandam loves the wooden shoes so much it made a museum for them.

The celebrated eyesore created by starry-eyed sweethearts.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

A church filled with the bones of hundreds of virgins martyrs—or so they say.