A beautifully rebuilt windmill from the 17th century, situated along the Amstel River.

This gem from the industrial age helps visitors and residents alike traverse hilly Stockholm.

This homeless brass fox tugs at your heartstrings from the foot of a Stockholm bridge.

Stockholm's deepest subway station is also a stunning ecological wonder.

It houses the remains of a 17th-century version of the Titanic.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

A wooden street sign is the last remnant of this 400-year-old alleyway.

One of the world's first dedicated bank buildings in the world is now the oldest one.

A man has revenged his true love's betrayal through tears and stone genitalia.

With its mine closed, this old village is starting to resemble a ghost town.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

This 2,000-year-old Doric bridge is still open to pedestrian traffic to this day.

One Italian taxi driver covered his entire house in small seashells creating a weird bit of architecture that is preserved to this day.

The collar worn by a fourth-century saint resides in this church, and is still used for blessings to this day.

This castle-fortress is a living example of the transition from medieval defenses to modern fortifications.

It’s Christmas every day at Barcelona’s oldest restaurant.

Turntable anonymously received orphans, alms, and groceries.

This mosque was based on Sub-Saharan Islamic architecture and created for the Senegalese Tirailleurs.

The Gaudí-inspired building that was the start of Terrassenc modernism.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

Dine amidst exotic plants at this former royal greenhouse.

The sixth of London's "Magnificent Seven" cemeteries, and a source of unlikely inspiration to Beatrix Potter.

According to legend, this tomb holds the secrets to time travel.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.