A Turkish hillside looks permanently frosted with snow — it's actually mineral rock

Pamukkale, meaning 'cotton castle' in Turkish, is a cascade of brilliant white terraces formed over millennia as calcium-rich hot spring water flows downhill and deposits travertine, a form of limestone. The ancient Greek city of Hierapolis was built directly on top of the formation to take advantage of the thermal springs, and its ruins still overlook the terraces today. Pamukkale and Hierapolis together became a UNESCO World Heritage Site in 1988.

— Wikipedia contributors, Pamukkale — Denizli Province, Turkey