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

The oldest stone house in Paris was built by its most famous alchemist.

A mechanized clock where a man fights off a dragon, crab, and rooster.

The oldest continuously operating mint in the world that has been making coins since the 9th-century.

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

The narrowest street in Paris.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

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

An unusual number plate signifies the building's saucy past.

The largest and oldest brick pagoda in Korea.

The burial ground of two kings and a queen is now a calm city park in the middle of bustling Seoul.

This human-made pond is part of a Korean palace complex first built in the 7th century.

This pagoda was once the central feature of a Buddhist temple that no longer exists.

A unique structure located on the grounds of one of five grand palaces that were built by the Joseon dynasty.

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

Over 80,000 carved wood blocks make up one of the world's oldest intact Buddhist canons.

A traditional village rooted in the Joseon Dynasty.

An early Korean refrigerator.

Numerical symbolism abound at East Asia's oldest observatory.

This tomb's name derives from a famous painting of a white horse found inside.

All that remains of an ancient royal palace is a water channel that was used for drinking games.

According to legend, those who pray at this statue will also be granted a wish.

A Korean village where times stands still.

Landbridge created by the South Korean version of Moses.