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

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

France's most famous cemetery, with some of its most curious tombs.

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

The famous artist couple lived and worked here, in two different houses connected by a bridge.

The only castle in North America to ever house European sovereigns.

66,000 pieces of art, donated by one of the world's richest men.

Frida Kahlo's childhood home, now a museum of her life and works.

A battle between nature and architecture in the Cambodian jungle.

Hindu temple of the dead home to hundreds of long-tailed macaques.

Myanmar's Mount Olympus atop a 2,500-foot volcanic plug.

This gem-encrusted temple is said to contain some of the Buddha's hair which can make the deaf hear and the blind see.

Over 2,000 ancient temples dot the Myanmar landscape at the site of this famed archaeological site.

An imperial fortress city that incorporated cultural elements from the entire Mughal empire, only to be abandoned the year it was finished.

A blooming house of worship for the masses.

Temples adorned with intricate, erotic sculptures make up one of the "seven wonders" of India.

Once an indicator of social class, the color blue has come to define this city on the edge of the Thar Desert.

The world's second-largest sundial, made entirely out of stone.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

A white Buddhist temple with a golden restroom.

Unexplained bald patches in the landscape grow and recede over time, as though they are somehow alive.

This "dead marsh" sits among the largest sand dunes in the world, a forest frozen in time.

A desert that rolls right up to the ocean, where it's so dry animals live off the fog.

300-year-old villagers houses and traditional churches preserve a nearly lost piece of Russian history.