The total land area is approximately 309,500km 2 and it is the third largest country in the Arabian Peninsula. As Sharqiya . Each of these is subdivided into smaller districts called wilayats, which are governed by the wali, the person responsible for the area who reports to the Ministry of the Interior. Topography Oman's terrain has a varied topography, consisting of plains, desert, mountain ranges and wadis. The rock matter is predominantly sedimentary and is rich in metallic mineral deposits, such as copper, chromite and gold.
Most conurbations arise on the coast.
It is thought that the cave was formed as a result of several chambers collapsing due to erosion. There are several islands located in Oman's waters, the largest of which is Masirah in the southeast which is accessed by boat and plane. The climate differs from one area to another. In the south, the Dhofar region has a moderate climate and the pattern of rainfall is more predictable with heavy monsoon rains occurring regularly between May and September. Average rainfall in Muscat is 75mm.