The Bloemen Route, or “Flower Route”, stretches 25 miles through prime Dutch tulip country as a result of “tulip mania,” the world’s first economic bubble.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

Tucked in the back of a flower shop, its collection details the fascinating history of the Netherlands's iconic symbol.

The mirrored section takes the shape of Hebrew characters when viewed from above.

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

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

Lumps of significant stone from around the world surround a flaming monument for peace.

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

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

A favorite with sightseers and locals alike, this Norwegian funicular provides easy access to a stunning view of Bergen and its environs.

This floating sculpture of ice is a poignant reminder of nature's power.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

Housing the famous Norwegian ice-defying 19th century polar exploration ship.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

Home to three historic ships from the age of Vikings.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

Spain's largest bullring offers a unique glimpse at architecture and history.

The world's largest wooden structure.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

A centuries-old forgotten underworld lies beneath Malta.

This 50-foot-deep sinkhole created in the 14th century is home to rare plants and fungi.

Perhaps the most spectacular grotto along the Algarve coastline.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.