The celebrated eyesore created by starry-eyed sweethearts.

This off-limits room in the National Library of France is home to a system of pneumatic tubes, once used to bring books to readers.

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

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

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

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

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

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

Paris' linguistic guide to the international language of, yes, love.

Europe's largest natural bridge has a 19th century royal chateau built into its side.

Two monstrous faces loom over a village in Czechia.

Bohemian paradise covered in majestic forests.

Portugal's National Pantheon has a history of curses, collapses and financial problems.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

The unique design was created by the traditional way communal rice paddies were divided among the indigenous people.

This tiny lake temple dedicated to a water goddess seems to float on the surface.

Bali's remote "gateway to heaven" is one of the most sacred places on the island.

One of the largest bamboo bridges in Asia, located right next to a bamboo school.

Isolated atop this Balinese sea crag is a lovely Hindu temple that is said to be guarded by sea snakes.

A haunting theme park is slowly being swallowed by the jungle.

It took 28 years to build this massive statue of the Hindu god Vishnu riding a mythical bird.

This Balinese sea temple is thought to be guarded by the hundreds of monkeys that live around it.