To the north of the country is a small exclave with a rugged coastline beside the Strait of Hormuz. This is the Musandam Peninsula, and is separated from the rest of Oman by part of the United Arab Emirates. The country in the north of the main part of Oman is mountainous, Al Hajar Mountains reaching almost to . They run parallel to the coast of the Gulf of Oman, with a narrow coastal plain in between. This is crossed by a number of wadis and has several oases. Central Oman consists of a tableland bounded to the west by the Rub' al Khali desert of Saudi Arabia. The coastline in eastern and southern Oman is barren. In the south of the country in the Dhofar Governorate, the mountains run in an easterly-westerly direction and include Jabal Samhan and Jebel Qamar.