Al-Ahsa has been known since ancient times for palm trees and flowing springs, and there are many sites in it that contain abundant and fresh water springs, among which comes Ain Al-Hara, which is located in Al-Mubarraz area in Al-Ahsa near the Al-Mubarraz cemetery, and it is famous among the people of that eastern region, and it is mentioned that the water of that spring is estimated With twenty thousand gallons per minute, its water reaches the surface of the earth through 3 craters, forming a large lake, and the reason for calling it that is because of the hot water that comes out of it. In summer, it is inevitable that the heat of the weather does not drive large numbers of young people, children, and adults also come to it at hours of the night and day in order to spend time there and have fun and also compete in holding some games, where the people of that region gather good memories in the past and even the present, as someone said Visitors to it, Haji Saleh bin Wahb bin Ali: “Ain Al-Hara has a luster and beautiful and good memories since the first time, where we go on foot and long distances in order to do swimming and bathing and enjoy the views of those warm waters and orchards surrounding Al-Ain in the summer and everyone is relaxing and having fun to enjoy With these scenes, you find the water of that spring cold in the summer, as everyone races to attend and take a bath in order to extinguish the scorching heat of the sun, and in the winter you find warm hot water.” It is one of the well-known springs in Al-Ahsa, specifically in the past, in addition to that people used to take it as a resort for swimming on occasion Marriage, and others take it as a hospital and a treatment for it, especially the elderly who complain of joint pain and rheumatism, and because this Al Ain mineral water is sulfur, it may help them in strengthening and healing their muscles.