Al Ahsa also known as Hajar is the largest governorate in Saudi Arabia's Eastern Province, named after the Al-Ahsa Oasis. In Classical Arabic, 'Ahsa' means the sound of water underground. It has one of the largest oases in the world with world-renowned date palms and, according to one author, the oases of Al-Hasa and Al Ain are the most important in the Arabian Peninsula. The oasis is located about 60 mi inland from the Arabian Gulf.