This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

This collection of French root art looks like an indoor fairy wonderland.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

A mythically themed self-built sculpture park.

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

One of the world's largest model railroads is a mind-boggling achievement.

A bizarre house filled with an astounding array of collections.

A single artist is behind these large-scale models made of hundreds of thousands of two-inch wooden matchsticks.

Colorful and chaotic stacked hotel in North Holland.

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.

A 30-acre garden inspired by the principles of modern physics.

Former hotel turned into haunted playground.