Hidden just under the waters around this Turkish island are the ruins of a once great city.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

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

A marvel of Byzantine engineering under the streets of Istanbul.

Roman ruins top white travertine terraces formed by ancient hot springs.

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

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

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

Traditional 11th-century outdoor tannery.

God's Saharan sandbox of wrath.

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.

Founded as a refugee camp, now a popular tourist spot.

Spirits from these lakes are said to produce the local weather and odd phenomena as they bicker between themselves.

After sunset the heart of Zanzibar's historic Stone Town neighborhood transforms into a culinary playground.

This "dead marsh" sits among the largest sand dunes in the world, a forest frozen in time.

A desert that rolls right up to the ocean, where it's so dry animals live off the fog.

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

A growing popular hipster market with over 100 local specialties and live music.

Formerly known as the Malay Quarter, Bo Kaap is a colorfully-painted suburb located in the “Mother City” of South Africa.

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

A secluded natural oasis hidden deep along a rainforest trail.

The world's highest and most dangerous infinity pool lies at the precipice of Victoria Falls.