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

This massive library holds what was once the largest book collection in the world.

Abandoned railway line circling the city of Paris.

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

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

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

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

A simple plaque on the facade is the only reminder that the treaty ending the American Revolution was signed inside.

A magical, macabre wax museum, beloved by locals, uses real artifacts to depict an assassination from the French Revolution.

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

An immersive projection art installation uses sound, scale, and light to take visitors inside classic works of art.

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

This off-limits room in the National Library of France is home to a system of pneumatic tubes, once used to bring books to readers.

Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

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

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

A battle between nature and architecture in the Cambodian jungle.

The quintessential Japanese rock garden has existed for more than 500 years.

1,001 carved statues of the Buddhist God of Mercy, each with a unique face.

A beautiful bamboo trail tucked in this famous Japanese Shrine.

Twelve hundred stone carvings guard this off-the-beaten-path Buddhist temple.

This 700-year-old street food market features baby octopus and soy donuts.

The 10,000 Torii shrine.