mazandaran province

“Badab-e Surt (Persian: باداب سورت‎) is a natural site in the Mazandaran Province of northern Iran, 95 km (59 mi.) south of the city of Sari and 7 km (4.3 mi.) west of Orost village. It comprises a range of stepped travertine terrace formations that have been created over thousands of years as flowing water from two mineral hot springs cooled and deposited carbonate minerals on the mountainside.” – Fereydoon Gharaei, 2015