The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Copenhagen's celebrated theme park and gardens.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

A Reformation-era fiery figurehead once denoted this location as a print shop.

This sculpture marks the spot where one of the greatest Roman rulers was proclaimed emperor.

Makers and sellers of the original and finest York Ghosts.

A century-old tradition has culminated in a small but singular collection of feline effigies.

Follow the original medieval paths that wind through this intriguing section of the city.

A hundred copies of Antony Gormley's naked body stare out across the water.

19th century tunnels burrowed under Liverpool.

The red letters in the literary pavement leading to the library form a mysterious code.

Created as a punny statement about genetic engineering this monstrous hybrid statue has become a beloved icon.

Gutted during the Liverpool Blitz, this architectural husk has been left destroyed in honor of the dead.

A real-life Professor Snape once taught in this Welsh university building, which students of course nicknamed “Hogwarts.”

A 19th-century funicular railway shuttles visitors up this surprising sea cliff to one of the world's largest camera obscuras.

A 4,500-year-old forest is slowly being revealed from beneath the sands of a Welsh beach.

A rare wooden coffin set vertically into the Gothic arch of an ruined church.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

After years of slow decline, a derelict Gothic castle is now being restored to life.

A former fisherman's hut deemed too small for habitation is now a delightful tourist draw.

This ancient castle has been abandoned since the Edwardian conquest of Wales.