Orlovi skali (Eagle Rocks) near Ardino, Bulgaria. This Thracian sanctuary dates back to 5th or 4th century BC. The complex is a large rock with about 100 trapezoidal niches used for rituals related to the cult of the dead.
Badab-e Surt, Iran. Photo by Abbas Arabzadeh. A range of stepped travertine terrace formations, created over thousands of years as flowing water from mineral hot springs cooled and deposited carbonate minerals on the mountain side.