Badab-e Surt (باداب سورت) is a natural site in northern Iran. It comprises a range of stepped t
Badab-e Surt (باداب سورت) is a natural site in northern Iran. It comprises a range of stepped travertine terrace formations that has been created over thousands of years as flowing water from two mineral hot springs cooled and deposited carbonate minerals on the mountainside. http://obscuropedia.tumblr.com -- source link
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