Al Hili Oasis, the northernmost oasis in Al Ain, covers an area of 60 hectares and contains nearly 40,000 palm trees on 252 cultivated plots. The oasis contains many historical structures, including two watchtowers and a fortified house built in the early 19th century. . The house of Bin Hadi Al Darmaki is located in the center of the oasis, and provides a good example of the fortified tower houses in the early nineteenth century that guarded the oases at that time. The house consists of a rectangular fence with a large square tower in one of its corners.