The architect of this fanciful complex called it an "oasis for humanity and nature in a sea of rational houses."

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

This former Nazi castle was built as a school to train what would have been the future of the Third Reich.

This small window display is dedicated to the noble carrot.

The last bastion of Roman presence north of the Alps looms over a German town.

This bell tower is the only one of its kind in the Netherlands and was a symbol of prestige.

The oldest Roman lighthouse still in use.

Giant topiary dog once played a role in a terrorist bomb plot.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

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

Amsterdam's former hotspot for public executions and dissections.

Oldest Museum of the Netherlands is a true cabinet of curiosities.

Scale model of St. Peter's Cathedral (Rome) in the middle of a small Dutch town.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

A true Valhalla for cactus and succulent lovers.

This hotel was once home to a steamliner company and became the final rest stop for Europeans heading to the New World.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

Old ships and machinery fill a historic harbor in the city that's home to Europe's largest port.

An early 19th-century English style garden hidden in the Rotterdam cityscape.

The Netherlands' first car tunnel has an unusually rectangular shape.

This charming pup is meant to celebrate the youth and stubbornness of the city's students.

Rotterdammers' dirty minds gave this Santa a dirty nickname and cursed it to a life of wandering.

A condensed piece of China floating in a Dutch harbor.