A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

This tile-work piece featuring a chicken riding in carriage is both a remarkable artistic creation and a social commentary of politics and culture in 17th-century Portugal.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

This enormous secondhand bookstore inside a Victorian train station sparked the "Keep Calm and Carry On" craze.

This giant wooden treehouse within a sprawling garden has its own eatery.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

Amsterdam's narrowest house facade is a monument to 17th-century tax evasion.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

Museum preserving torture methods from the past.

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

The lasting remains of a bygone era of open-air meat markets.

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

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

A six-ton wedding present for the King of the Scots.

The building where Mary, Queen of Scots was said to have bathed in white wine.

The final resting place of soldiers' loyal canine companions.

Protecting the dead from opportunistic body snatchers.

A book bound in the skin of an infamous criminal, along with countless other specimens.

The most loyal of little dogs, or a Victorian era publicity stunt?

Overlooking the burial ground is a tower designed to prevent thieves from snatching the recently deceased.

The dance of this huge clock is a magnificent and eerie commentary on good and evil in the history of humankind.

This early version of the guillotine was used to execute the man responsible for its construction.

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

This 16th-century house tells the city's history through old artifacts and quirky tales.