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

The celebrated eyesore created by starry-eyed sweethearts.

What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

This abstract sculpture is rumored to cast a hammer-and-sickle shadow once a year.

This bronze sculpture on a former squash court marks the secret origins of the Atomic Age.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

The site of a concentration camp where inmates were made to take part in one of the largest counterfeiting operations in history is now hauntingly empty.

Cold war icon and onetime "hole" in the iron curtain.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

Rusty red sands line the shores of this Canadian Province.

Civil War Fort on an island in the Boston Harbor.

North America's largest accredited model railroad museum.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

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

This surreal statue brings a famous French novel about a supernatural cad to arresting life.

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

This Paris art space celebrates the creativity and ingenuity that springs from abject poverty, especially in Africa.

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.

A Parisian exterminator's shop whose storefront displays stuffed rats hanging from traps.

Montreal's giant farmer's market is a foodie's best friend, especially in the winter months.

Small ship votives hang from the vaulted ceiling of this port-side church with a Latin inscription on the wall.

Futuristic apartment blocks are the backdrop for Montreal surfers hangin' ten on the Habitat '67 standing wave.

One of Canada's oldest museums, the beautiful Redpath has been serving up Natural History and Ethnography since 1882.