Ferdows Hole-in-the-Rock

Ferdows Hole-in-the-Rock ( – Sang-e-Sourakh Ferdows) is a natural geological formation located 35 km west of Ferdows, South Khorasan Province, Iran.

Description
"Sange Sourakh" translates to "Hole Rock" in Persian. Ferdows Hole-in-the-Rock is an elliptical opening around 20 m wide eroded in a Limestone hill. The hole is believed to have been formed over millions of years by wind and water erosion, carving away at the limestone rock. The formation is steeped in local folklore and legends, adding to its cultural significance. It's nestled within a limestone hill. As the sun moves throughout the day, light illuminates different parts of the hole, creating a variety of differently-shaped shadows throughout the day.