This famous city eluded concrete detection until the early 2000's.

One of the largest wooden constructions in Europe was meant to be a casino, but soon became an orphanage.

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.

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

Large miniature theme park with 100-plus models.

A fountain standing as a testament to a doomed alliance.

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

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.

Mausoleum and Holy Seat of Antiochus I of Commagene.

The largest Neolithic ruins in the world hide a notably clean prehistoric metropolis.