The Sharqiyah region of the Sultanate of Oman has many wadis, known for turquoise waterbeds nestled in limestone valleys. Start the journey by visiting the Bimmah Sinkhole, before crossing the waterbed of Wadi Shab to the mouth of the most famous wadi in the region. From the date palms and crops at the mouth to the vast turquoise pools at the far end, explore the millennia-old irrigation channels and the cascading natural waterfalls along the dangerous walkways cut into the limestone.