deal with tons of sand which the wind carries and deposits over the land. To counter this problem, the Kingdom has planted large barriers of trees to prevent the wind-borne sand from damaging inhabited and agricultural areas. Recreation sites One of the oldest mosques in Islam, Jawatha Mosque, is reputed to be found here, as well, and several historic remnants of Ottoman Turkish influence can be seen in buildings such as Qasr Ibrahim and the Qasr Sahood. Many pictures of old Al-Ahsa and the Eastern Province were taken by the Danish explorer and convert to Islam Knud Holmboe (1902–1931) in his travels through the Middle East. Here is a list of some historical and recreation sites: Jawatha Mosque Uqair: Seaport is situated on the Persian Gulf in eastern Al-Ahsa. It has lost its focal role as a fishing and transport site, and is now an outing place for people of the region. Qaṣr Ibrāhīm () is a castle built during Ottoman rule. It is located prominently in Al-Hofuf city. Natural Springs like those in Umm Sabaa provides curative mineral water at a steady rate. Jabl Al-Garah is a hill (locally called a mountain) in Al-Garah a village of the same name offers visitors cool air in the summer months. Qasr Sahood () is a Palace built during Ottoman rule in the city of Al-Mubarraz. Salwa Beach () is sandy beach about from Al-Hofuf. Al-Shuʿbah Mountain (). Jabl Al-Arbaʿ () are sandy hills about from Al-Hofuf, on the way to Qatar . Al-Ahsa National Museum. Al-Ahsa National Park, located at Al-Omran town. See also Eastern Province, Saudi Arabia Ghawar Field, Earth's largest, has produced over half of all Saudi oil Citations References Riyadh Newspaper Recreation Utilities in Al-Ahsa by Abdullah Al-Shayeb Sources Al-Ahsa a Geographical Study by Abdullah Al-Taher Recreation Utilities in Al-Ahsa by Abdullah Al-Shayeb External links Municipality of Al-Ahsa (Arabic) Al-Ahsa Website Eastern Province, Saudi Arabia Oases of Saudi Arabia Governorates of Saudi Arabia Al-Ahsa Governorate