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

These ruins once flourished as the capital of the Lydian kingdom, often credited with the invention of metal coinage.

This crumbling medieval basilica once attracted pilgrims by the thousands to collect a miraculous dust that formed above the saint's tomb.

Carvings in Turkey's Marble Road may have directed ancient Romans to a hidden brothel.

France's national museum of scientific and industrial instruments.