These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

Where condemned pirates met their grisly end at the gallows on the River Thames.

The remains of Crystal Palace Great Exhibition of 1851.

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

This coffee shop lies hidden beneath a historic church.

The oldest floral clock in the world still functions today.

One of only three examples of a stained glass window manufactured by the Tiffany Company in Scotland.

If you fly into Edinburgh Airport, it's possible to spot this prehistoric site without even getting off the plane.

These sculptures of various animals adorn the building that houses one of the capital's least known museums.

This sculpture commemorates Edinburgh's sister city and their respective celebrity dogs.

This extraordinary Viking artifact has traveled throughout the city.

This extinct volcano rises above Edinburgh and is special for its panoramic views over the city.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

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

This grand gate once marked the entrance to a military barracks.

Built to celebrate the glory of a new queen, this forgotten monument has moved around Madrid three times, reflecting 200 years of political whims and city redevelopment.

Artist Natividad Sánchez wrote a new ending for one of Roman mythology's tragic love stories.

This modernist bridge highlights the bear as a symbol of Madrid.

This historic fountain is a favorite neighborhood meeting point.

Feast on cuttlefish ink-stained paella by the beach.

After the queen of Spain had a dream where these statues fell and crushed her, they were removed from the palace and given new homes around Madrid.

The Spanish king's private bathroom embraced the idea of a porcelain throne.

One of the best examples of the modernist movement in Madrid.

This fountain was designed to honor the man who helped bring water to Barcelona.