This museum in a Paris apartment gives a unique look at the iconic French singer's life.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

The first green space constructed on an elevated viaduct.

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

This Parisian café sticks almost exclusively to an ethos of reuse.

This Parisian fountain is a little bit fantasy and a little bit nightclub.

A majestic lion statue guards this Parisian botanical garden, and feeds on an unsettling item.

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

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

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

The world's only museum devoted to the wonders of fluorescence.

The place where Czar Peter I of Russia resided in 1697 during his Grand Embassy.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

This homeless brass fox tugs at your heartstrings from the foot of a Stockholm bridge.

An ancient rogue artist community hidden next to one of the world's most glitzy and glamorous cities.

A man has revenged his true love's betrayal through tears and stone genitalia.

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

This Stockholm light tower can be controlled by anyone with a smartphone.

The world's first ice hotel is still one of the most elaborate and beautiful.

It houses the remains of a 17th-century version of the Titanic.

From Coke II to Google Glass, this exhibit features some of the most spectacular commercial flops.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

A fairytale-like medieval church perched atop a rocky cliff on Italy's "Coast of the Gods."

The fairy tale castle of the "fairy-tale king."