This was once the center of the Birdman cult, and is now a World Heritage Site.

A volcanic crater that visitors can look inside.

The ominously named cave is home to some remarkable ancient art.

The world's most remote airport.

A moai decorated with the depiction of a European ship.

The largest stone moai on Rapa Nui.

In the Middle Ages, villagers would sound this stone trumpet to boost fertility and coax fish to shore.

This large round boulder is said to emit spiritual power, but it may just be magnets.

Turkish adventurer antiques in the heart of the Grand Bazaar.

This column celebrates Rome's victory over the Goths, and may be the oldest Roman monument in Istanbul.

A section of the long chain that blocked enemy ships from entering Constantinople.

1513 Turkish world map, full of European state secrets and snarky commentary.

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.

Legend says if you stick your thumb in the hole and it gets wet, your wish will be granted.

A fountain standing as a testament to a doomed alliance.

A tiny park in the middle of some big power politics.

Ancient serpentine sacrifice holder that has stood the test of time.

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

A sixth-century Byzantine cistern hidden below a modern carpet store.

Hundreds of luxurious boats line this gorgeous lake surrounded by mountains.