Go inside a revolutionary, cage-less zoo where 35 species live and some of them roam free alongside their human visitors.

A UFO-shaped event building originally intended to be a science museum showcasing the future.

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

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

The ruins of this Dutch castle sit atop a labyrinth of once-secret tunnels and passageways, dating back over 900 years.

The world's oldest Jewish library was founded by Sephardic Jews in 17th century Amsterdam.

The world's first interactive human body museum also serves as a chair for a giant orange man.

Take a stroll through the hellish grotesques of Hieronymus Bosch in this elaborate Netherlands church.

This Netherlands museum holds a gloriously mechanical collection of ornate musical automata.

Hidden within a Netherlands crater is a stone bed that lets those who lie in it see the sky as a curved surface.

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

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 beautifully designed star-shaped fort was the premier defense system of the late 1500s.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

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

A beautifully eclectic mix of architectural styles.

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

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

Inspired by "The Starry Night" this Dutch bike path turns into a glowing work of art each night.

A floating cat sanctuary on an Amsterdam canal.

Peek through a transparent pyramid and drink in the mountain made of books.

Museum preserving torture methods from the past.

While the U.S. and Soviet Union were engaged in a space race, Poland built a UFO on the ground.