After Al-Ahsa date palm trees oasis was inscribed on the UNESCO’s World Heritage List in 1918, the Guinness World Records has recently recognized Al-Ahsa as the largest date palm trees oasis in the world. The oasis boasts more than 2.5 million date palm trees and occupies 85.4 square kilometers. The oasis is irrigated by 280 artesian water springs. Al-Ahsa date palm trees oasis is a fascinating tourist destination because of its historical past. It is one of the oldest places inhabited by humans thousands of years ago.