Badab-e Surt

The red color of travertine terraces are due to iron carbonate

Badab Soort (Persian: باداب سورت) is a natural site in the Mazandaran Province in northern Iran, 95 kilometres (59 mi) south-east of the city of Sari, and 7 kilometres (4.3 mi) east of the village Orost. 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.[1]

  1. ^ "Cultural Heritage Agency of Semnan". Archived from the original on 2015-09-24. Retrieved 2010-12-07.