Ubar: The mysterious city of columns buried under sand

In the 1st millennium B.C., at the intersection of great trade ways, the powerful Sabeysky kingdom which stretched from the Red Sea to Governorate of Hadhramaut and from the Central Arabia to the Indian Ocean settled down. This state was known the wealth and prosperity, thanks to trade with the Mediterranean, India and Africa. However, a number of internal and external factors led to its decline. One of the key reasons was destruction of the Maribsky dam which was constructed in the VI century B.C. and was one of miracles of the Ancient world. The dam provided an irrigation of hundreds thousands...