This bridge was constructed from the rubble of the infamous Bastille.

This is the real-life “Phantom of the Opera” box from Gaston Leroux's 1910 novel.

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

A lush vertical garden blooming in the heart of Paris.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

The video game-themed street art first popped up in the French city.

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

The celebrated eyesore created by starry-eyed sweethearts.

A surrealist timepiece by the artist of melting clocks.

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

This 400-year-old tree is actually an immigrant from North America.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

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

This modest marker near Notre Dame identifies the very center of Paris.

The narrowest street in Paris.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

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

The shallow, salty inlet was a safe haven for 19th-century pirates.

These beautiful historic watchtowers were used for both scanning the desert for enemy invaders and observing the celestial world.

This vibrant side road in Doha was painted light blue to reduce heat.

This fountain pays homage to Qatar's history of pearling, the primary industry before oil.

Striking, enormous gold-plated sculpture of Buddha installed in the 19th century.

This enormous gold Buddha statue was hidden inside a stucco decoy for centuries.