The bridge is a secret gallery of discarded gum that has been transformed into miniature masterpieces.

This five-star hotel was originally a swanky parking garage.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

A kaleidoscopic warehouse-maze of handmade neon signs.

The charming storybook building now houses a small police museum.

Edinburgh's oldest statue hides within a parking lot behind the city's iconic cathedral.

One of Edinburgh's oldest pubs hides a 19th-century skittles alley in the back.

This king penguin is a knighted brigadier of the Norwegian Army.

A beautiful Greco-Roman structure houses a well once believed to have healing powers.

An American ghost town hides along a side street in Scotland's capital.

This allegedly haunted 16th-century tower house-turned-museum exhibits thousands of spectacular objects.

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

This series of Scottish caves has no clear purpose other than baffling historians.

The dome-shaped reservoir of this old water tower produces unique acoustic effects.

An oil drilling mistake created this fountain that has been spraying water for over 150 years.

An abandoned, deteriorating tuberculosis hospital from the turn of the 20th century.

Not quite the cultural gateway between China and Sweden its designer imagined.

A museum dedicated to the history of psychiatric treatment featuring a gallery of art made by patients.

The world's biggest version of the popular Swedish souvenir.

Visit the home of Sweden's beloved fictional character, Pippi Longstocking.