In Egypt's expanding metro area, many of the neighbors are dead.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

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

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.

A fortress-like granary that has been continually in use for more than nine centuries.

Magnificent Roman ruins lie vulnerable to destruction on the edge of the Mediterranean.

A beautiful oasis town dating back to the Roman period still serves as reprieve from the brutal summer sun in Libya.

An ancient Ethiopian cave church is endangered by the simple building of a road.

An otherworldly restaurant perched on the edge of a jagged cliff next to a medieval holy city.

An Ethiopian "Jerusalem" featuring a church hewn out of a single rock.

Despite many attempts to finish this overpass, it has been abandoned since the 1970s.

The South African dialect's complex history is immortalized in stone, in one of the world's only monuments dedicated to a language.

The original goat tower, the one that started it all.

A sobering account of the vibrant multicultural neighborhood that was destroyed under apartheid.

The largest prehistoric ruins south of the Sahara, once a powerful center of international trade.

This African beach is home to thousands of rare mainland penguins that are known for their annoying voice.

South Korea's largely symbolic, barely used gateway to the North.

Secret North Korean passage discovered below the world's most dangerous border.