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

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

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.

The history of radiation is on safe display at the foot of a radiation science laboratory.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

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

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

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

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

One of the oldest medical collections in Europe focusing on rare surgical instruments.

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

A remnant of Korea's colonial past lies forgotten in a hip neighborhood in Seoul.

Home to more than 13,000 pieces of war memorabilia and military equipment.

The supreme shrine of the state.

The headquarters of Korea’s provisional government later became the site of a prominent statesman's assassination.

A small section in the Bank of Korea Museum dedicated to the many varieties of the Joseon dynasty’s iconic coinage.

The Shinsegae Department Store is the largest of its kind in the whole world.

Booksellers and public artworks fill this vibrant promenade along the disused railroad tracks.

Rubbing the buttons along this statue's coat is considered good luck.

A unique sculpture calls the outside of this steakhouse home.