A striking 12th-century-style castle built on the edge of a cliff.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

Abandoned outpost once home to a murderous tyrant.

Napoleon's childhood home is now open for people to explore the beginnings of France's short general.

This otherworldly French waterfall looks like its waters have turned to stone.

France's Lilliputian park displays over 100 of the country's monuments for visitor perusal.

This futuristic observatory at the top of the Pyrénées offers unrivaled views.

The artist and his brother are buried in a landscape straight out of a van Gogh painting.

One of the world's most complex timepieces.

The great Italian Renaissance painter was laid to rest here in the Chapel of Saint-Hubert.

Two awe-inspiring globes from the reign of the Sun King hang from the ceiling of France's national library.

This historic island prison holds one of the dungeons from the Count of Monte Cristo even though it is a work of fiction.

An aluminum skeleton brings Chinese mythology to the French shore.

Ancient paintings known as the "Sistine Chapel of Cave Art."

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

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

19th century pendulum and a clock restored by a rogue group of guerilla artists.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

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

The grandest stage for the world's foremost masters of invisible instruments.

Rent out a glass igloo to watch the Northern Lights like you live in the future.

The largest lake in the Faroe Islands seems to be held hundreds of feet above sea level thanks to an optical illusion.

This remote island village was in danger of depopulating completely until a tunnel was built to connect it to the rest of the world .

Mysterious craters may have been home to an ancient cult.