Squeezing inside this deep, narrow canyon reveals a festival of desert colors.

This subterranean funicular is one of the world's smallest subways.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

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.

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

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.

Morocco's Argania trees are infested with nut-hungry goats.

The maze-like transportation hub contains abandoned areas, derelict stores, and a resident bat colony.

Tel Aviv's popular neighborhood went though endless waves of transformation.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

A floundering Polish shipyard was once the soul of the Solidarity movement that capsized communism.

A merchant court dedicated to the fictitious King Arthur is heavily adorned with bizarre Renaissance art.

A striking public sculpture representing the period of martial law in Communist Poland.

A collection of old neon signs from all over Poland line a secluded courtyard.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

While the U.S. and Soviet Union were engaged in a space race, Poland built a UFO on the ground.

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

This sprawling concrete suburb of Kraków was designed by the Soviet Union as the model proletarian city.

Museum dedicated to "the man who moved the Earth."

An abandoned Jewish sanatorium is tucked within the woods of Poland.

A menacing statue of this mythical creature can be seen at the legendary site of the monster's lair.