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

Stone Age solar temple is aligned with the sun on each equinox and solstice.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Brussels' favorite peeing boy has a sister.

A little sculpture with a large wardrobe.

Giant topiary dog once played a role in a terrorist bomb plot.

A Spanish town built into the cliffs.

A 12th century church completely covered in shells.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

A statue honors the local legend that the devil helped build St. Mary's church after being tricked into thinking it was going to be a wine bar.

The bells remain in a shattered heap exactly as they fell when the church was bombed in World War II.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

Visit a surreal landscape so otherworldly NASA actually used it to train the Apollo 17 crew.

Built in 1512, the oldest cathedral in the Americas.

Mysterious Spanish catacombs of unknown origins.