This luxury shopping lane has been protected by its own tiny police force for over a century.

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

This sprawling Jewish cemetery is one of the largest in Europe.

Reminders of the Battle of Berlin still scar the railway.

The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.

This conical hill was built as a testing ground for an engineer known as the Glider King.

Floating swimming pool within a moored vessel.

Legend says these colorful, invasive residents are the descendants of birds released by Jimi Hendrix.

The spiral staircase hidden inside this giant Parisian column was likely built for Catherine de Medici's astrologer.

One of the oldest masonic museums in Paris.

Beggars were miraculously "cured" of their fake ailments when they returned home to this 17th century Paris slum each night.

135 bronze medallions mark a French meridian line which once rivaled the hotshot Greenwich timeline.

An off-the-beaten-path boutique stuffed with an eclectic collection of upcycled goods.

One of the last umbrella repair shops in Paris upholds the nostalgic art of umbrella making.

This surreal statue brings a famous French novel about a supernatural cad to arresting 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.

A subterranean shelter remains intact under a busy Paris railway station.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.