A series of abstract, silly sculptures represent the works of a great modern classical composer.

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

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

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

The first green space constructed on an elevated viaduct.

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

Abandoned railway line circling the city of Paris.

This stunning French estate was so lavish that it landed its original owner in jail for the rest of his life.

Despite centuries of architectural innovation, this French castle is being built like it's the 13th century.

Museum in a swimming pool where the water still flows.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

A little sculpture with a large wardrobe.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

The world's largest reflecting pool is just two centimeters deep.

The attic of a four-century-old canal house hides a clandestine church.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

Mysterious and ancient carved standing stones.

As one of the world's largest hydroelectric dams this plant took two countries to get built.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

A small but industrious mining operation that allows visitors to touch precious gems while they are still in the rock.

Abandoned bull fighting ring, slowly falling apart in Uruguay.