 The limestone rich sedimentary deposits of Oman's mountains have led to cave formation in many places.In 2008, the Ministry of Tourism issued a plan to develop Majlis al Jinn, the world's second largest cave, as a show cave, after their first show cave, Al Hoota Cave, attracted 75,000 visitors in the first year of operation.There are caves which can be accessed by amateurs, like Muqal Cave in Wadi Bani and Khalid in Ash Sharqiyah region, while others need considerable effort, training, experience and specialized equipment.