The Bimmah Sinkhole is a natural geological formation that formed a wide hole in the rock, at the bottom of which lies a turquoise pool.
My suggestion
The spot isn't really easy to find. When you see the sign for Hawiyat Najm Park, don't turn on the trail that's right past it, but keep going a little bit and take the paved road.
Jabal Akhdar is a mountainous region located approximately 2 hours' drive from Muscat. It's a magnificent place, between mountains and greenery, where the sun and the heat seem to have spared cultivation and vegetation.
Nizwa is one of the largest cities in the country. During your visit to Oman, don't miss out on this city packed with history and the centre of numerous activities.
Salalah is the most important town in the Dhofar region, located in the south of Oman. It's a town full of resources, such as its industrial port and its frankincense supplies. Travellers can discover culture and the frankincense harvest there, beautiful buildings and even scuba dive.