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.

One of the largest single-span stone-arch bridges in the Balkans looks like something straight out of a fairytale.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

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

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

These quintessentially English stepping stones were built for Victorian tourists.

This century-old grotesque has a mysterious history and may not actually be a rabbit.

This sculpture commemorates a naturalist and an illustrator whose work was a forerunner to modern field guides.

The highest peak in all of England is plagued by dangerously fickle climate shifts.

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

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

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

At night, bats patrol this magnificent 18th-century space in search of book-eating pests.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

This charming candle shop has been in business since 1789.

The world's oldest bookshop still in operation.