A lush green oasis in the middle of Chicago.

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

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

The "Prussian Versailles" that is as glorious today as when it was built.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

The first green space constructed on an elevated viaduct.

A museum dedicated to one of Paris’s most famous residents, tucked into a corner of one of the city’s most famous squares.

The history of radiation is on safe display at the foot of a radiation science laboratory.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

Notorious artist squat renovated into legal studios.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

France's most famous cemetery, with some of its most curious tombs.

Deliberately hidden for centuries, the magnificent Saadian Tombs were eventually uncovered in 1917.

A fortified city, home to a remaining population of five families

Traditional 11th-century outdoor tannery.

This vast masterpiece of Moroccan architecture spreads across 20 acres.

God's Saharan sandbox of wrath.

North Africa's first museum of its kind preserves the culture of Moroccan women and their artistic achievements. 

World's largest film studio, where visitors tour the decaying sets that litter the harsh desert environment.

The other side is actually green.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

One of the most spectacular canyons in the world.