Despite many attempts to finish this overpass, it has been abandoned since the 1970s.

A catapult rock from Gotland’s 13th-century civil war is still lodged in Scandinavia's best-preserved medieval city wall.

An enchanting tunnel of cypress trees leads to an old morse code station still used today.

A fantastical 13th-century fortification sandwiched by a modern hotel in central Brussels.

Crooked windswept pines give this old forest an enchanted and magical look.

"Only the dead get off at Kymlinge."

This Norwegian satellite station provides ground services to more satellites than any other facility in the world.

Built entirely of interlocking pieces, construction of this Chinese Muslim house of worship required zero nails.

Stockholm's deepest subway station is also a stunning ecological wonder.

A long-closed church turned into a saintly skate park.

Cat art as far as the eye can see.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

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

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

Amsterdam's former hotspot for public executions and dissections.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

The former home of a mad diplomat is said to still be marked in bloody, arcane scrawls.

This historic Amsterdam bar used to accept sailor's monkeys as payment.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

A public urinal so pretty, it was declared a national monument.

A beautifully eclectic mix of architectural styles.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

This unattributed sculpture in Amsterdam is hiding in plain sight.