One of the two original gateways into the Kasbah, this gateway is a nesting site for storks.

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

This vast masterpiece of Moroccan architecture spreads across 20 acres.

The largest madrasa in Morocco once housed more than 900 students within its exquisite walls.

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

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

The Roman city was the birthplace of various emperors and is home to one of the empire's most impressive architectural feats.

An eerie collection of the surviving structures from a past celebration of the future.

The final resting place of the great navigator, or maybe his brother.

The world's largest wooden structure.

The ancient latrines of the Greeks, in all their public glory.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

This famous city eluded concrete detection until the early 2000's.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

A marvel of Byzantine engineering under the streets of Istanbul.

Breathtaking and huge 430 year old maps of Italy.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

Where dogs like the rare "Fire-Tailed Border Cocker" run free on the mountainside.

The crumbling remains of a once-grand building.

A crumbling cathedral condemned by an earthquake.

A legendary tree towers within its own vibrant sanctuary.