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

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

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

A statue of the second-tallest Dutchman in history.

This enormous storm barrier is one of the largest moving structures on Earth, with each arm taller than the Washington Monument.

Wind power station for making famous Ketel One vodka.

The largest flower auction house in the world.

Go inside a revolutionary, cage-less zoo where 70 species of monkeys roam free alongside their human visitors.

A miniature city, once ruled by the Queen of the Netherlands.

A school-themed restaurant where gastronomy is the core curriculum.

A cluster of granite granaries perched on stilts.

A pair of mutilated bronze octopuses slump at the base of the monument honoring California's admission to the U.S.

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

A German apartment building hosting as many trees as human occupants.

The world's greatest slide descends 18 stories from this looping mountaintop viewing platform.

People can't get enough of these adorable Japanese photobooths.

Europe's largest natural bridge has a 19th century royal chateau built into its side.

The sign at the garden gate reads: "These Plants Can Kill."

The first spinning jail built in the United States is the only one that still turns.

Enormous underground chamber built to detect 'ghost particles' of the universe.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

A saintly relic hidden in a Prague church basement.

A collection of anatomical samples from one of the first anthropologists to suggest that humans reached North America by crossing the Bering Strait.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.