This imposing tower named after the mythical sword of King Arthur is considered the tallest freestanding climbing wall in the world.

A 1:20 scale piece of the Netherlands commissioned by a queen lets visitors take a stroll as giants.

Live out your childhood construction fantasies in this one-of-a-kind gyrating hotel.

Two gravestones clasp hands over the religious divide.

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.

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.

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

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

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

A cablecar-station-turned-revolving restaurant with 360-degree views of the Swiss skyline.

One of the world's largest collections of pharmaceutical artifacts.

The last woman executed for witchcraft in Europe is remembered in this Swiss museum.

Enormous, fluffy dogs frolic around this museum dedicated to a legendary Saint Bernard.

A Swiss board game museum housed inside a picture-perfect castle.

150-year-old satirical tableaus made from stuffed frogs.

The steepest classic funicular in the world glides along a dizzying incline.

The tallest outdoor elevator in Europe rockets passengers on a dizzyingly precarious ride to the top of a mountain.

The site of Austria's biggest concentration camp now honors its victims.

The world's most important buildings shrunk to a tiny size.

Fantastic stories on a miniature railroad.

Ugly 18th-century dwarf statues living in a perfectly landscaped Austrian garden.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

The world's largest collection of intentionally useless inventions.