Map of Ma`rib, capital of Sheba and the dam built in the 9th century BCE which created what the Koran calls "TWO GARDENS," of wadi Adhana/Dhana, Sura 34, 14 & 15. Note area under cultivation in ancient times. I have argued this event lies behind Genesis' Garden of Eden. (p.182, Pertti Hamalainen.
Yemen, A Travel Kit. Hawthorn, Victoria, Australia. Lonely Planet Publications. 1988, 1991 2nd edition)