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

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

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

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

Down a cobblestone alleyway is a museum dedicated to Romanticism, with a secret garden.

Egyptian Revival movie palace abandoned for decades and restored in 2013.

This museum houses an imposing skeleton army comprised of creatures great and small.

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

This Parisian café sticks almost exclusively to an ethos of reuse.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

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

A museum of carnival attractions where you are invited to ride the rides.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

Abandoned railway line circling the city of Paris.

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

The deadliest diving spot in the world is also a stunning geological marvel.

One of its engravings is believed to be among the first representations of medical and surgical instruments.

Egyptian treasure trove of fossils documenting the whale's transition from land mammal to sea creature.

A preserved oasis with traditional Andalusian-style architecture and beautiful views of the Nile.

This ancient structure is widely thought to be the oldest intact pyramid in the world.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

An alien landscape of chalk-rock in the Egyptian desert.

Known as the Sistine Chapel of Egypt, this tomb houses some of the most well-preserved paintings in Egypt.

One of the most well-preserved temples of ancient Egypt.