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

Rich with fauna and flora, nature-lovers can walk across the sea at this UNESCO World Heritage spot.

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

The giant scales in this museum can still tell if someone is one of the devil's brides just by weight.

Crouch down, stretch tall, and be sure to flail your legs to pay homage to the Monty Python classic.

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

This subterranean studio is filled with fascinating kinetic art.

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.

Famed for its pie, this eatery has a hidden tunnel that allowed Catholics to secretly walk to church during the Reformation.

A beautiful maze marks where three countries meet.

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

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

This historic Amsterdam bar used to accept sailor's monkeys as payment.

Seven mini rowhouses fill the gap between 54 and 70 Westerstraat.

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

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

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

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

A curious collection dedicated to human and animal anatomy and pathology.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

The half-finished remains of what would have been Scotland’s biggest piece of landscape art.

The hidden lair of an alchemist rediscovered in a 2002 flood.

A spherical "micro-nation" in the heart of Vienna.