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

Where the lovelorn find a home for their sentimental keepsakes.

This stunning, out-of-the-way Croatian monument commemorates a community's uprising against occupying fascist forces.

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

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

This demon atop the Notre-Dame de Paris looks utterly bored.

A Belle Epoque bordello turned into a themed love hotel.

An all-American grocery store in Paris sells U.S. "cuisine" like Pop-Tarts and Heinz ketchup to homesick ex-pats.

The celebrated eyesore created by starry-eyed sweethearts.

An iconic and eccentric bar for "Manouche" Jazz music keeps expanding its space—and its influence.

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

How did a French journalist’s grave become the sexiest statue in the cemetery?

The history of radiation is on safe display at the foot of a radiation science laboratory.

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

"In the Dark" Restaurant in Paris offers dinner in complete darkness.

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

The very center of Paris is surrounded by a bevy of strange good luck rituals.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

Paris' linguistic guide to the international language of, yes, love.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

Notorious artist squat renovated into legal studios.

Numerous impressive carvings are embedded in the trees lining this street in Marrakech.