Roman ruins, natural methane fires and a lovely beach.

The best-preserved ancient theater in the world.

Once described as the "Eagle's Nest," this ruined ancient city rests on a remote mountaintop.

This arch granting triumphal entrance into Antalya was designed to honor the emperor's visit.

Eat your way through history.

One of the newest mosques in a city filled with thousands.

Taking the subway here means doing so over a bridge located in the middle of an estuary.

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

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 fountain standing as a testament to a doomed alliance.

This crucial gathering spot along the "hippie trail" still displays old notes between traveling beatniks and backpackers.

A marvel of Byzantine engineering under the streets of Istanbul.

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

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

Quite possibly the oldest love poem known to humankind.

No one is sure if the world's fourth-largest diamond had been found in a rubbish heap or was pawned by Napoleon's mom.

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

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

An Art Nouveau gem hides beneath the layers of city grime obscuring this once-magnificent building.

This urban oasis is a marvelous meld of music and landscape architecture.

The only remaining historic maritime signal station in the United States.

More than 50,000 gannets claim the cliffs of Bonaventure Island.