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

A charming flea market shop dedicated to retrofuturistic apparati.

A poem by Arthur Rimbaud is inscribed on the wall of a street that, while it is only one block long, plays a key role in multiple novels.

This emotive sculpture was originally created for the 1878 World's Fair.

This recessed garden protects thousands of mountain plants by creating its own microclimates.

Dedicated to the art of hunting, with juxtapositions of contemporary art.

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

The headless bodies of more than 1,300 guillotined victims of the Reign of Terror are buried here in mass graves.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

A band of aerialists and circus performers putting on incredible shows in East Williamsburg.

Ride the subways of yesteryear.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

This abandoned subway station can still be seen on regular commuter trips.

A terrific purveyor of natural history objects and curios.

The final resting place of New Orleans' most famous voodoo priestess.

Birthplace of the Tendai sect and home to the marathon monks.