Pamukkale, near the city of Denizli in inland western Turkey, is famous for its white travertine terraces: a hillside covered in layers of chalk-white mineral deposits and shallow pools, left by warm, mineral-rich spring water over thousands of years. The name means "cotton castle" in Turkish, and from a distance the slope really does look like snow.
On top of the terraces lie the ruins of Hierapolis, an ancient spa city with a large theatre, long colonnaded streets and one of the biggest ancient cemeteries in Anatolia. Pamukkale and Hierapolis together are a UNESCO World Heritage Site and one of the best-known sights in Turkey. Most visitors walk up through the terraces and then spend time exploring the ancient city above.