Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

An ancient underground cultic temple where sunlight penetrates on the summer solstice.

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

Neighborhood in Jerusalem is home to the ultra-orthodox haredim.

As the Dead Sea continues to deplete, massive sinkholes open along its banks.

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

This collection of reclaimed landmines acts as both an exhibition of their deadly history and as a shelter for children affected by them.

A battle between nature and architecture in the Cambodian jungle.

Khmer Rouge's high security prison.

5,000 skulls in memorial to those killed by the Khmer Rouge.

The oldest operating pharmacy in the world features 800-year-old recipes.

Go inside to really appreciate this 500-year-old technological masterpiece.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

This museum was invented in a novel before being made real by the author.

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

A marvel of Byzantine engineering under the streets of Istanbul.

The oldest known university in the world is in Fez, Morocco.

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

Traditional 11th-century outdoor tannery.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

The other side is actually green.

It's estimated that half of the world's gold was mined from South Africa's "golden arc."

A safari-themed castle in the South African bush with the largest maze in the southern hemisphere.