Since it is uniquely situated in the path of the Khareef, or South Western Monsoon, this stretch of the Dhofar Coast is covered in fine mist and frequent rain from mid-June through mid-September. By the time the monsoons cease, the entire coastline is a verdant stretch. Waterfalls, rolling grasslands, and thickly wooded wadis (riverbeds) thrive alongside rapid mountain streams. Unique in this desert region, Salalah attracts many visitors from the surrounding Arabian Gulf countries who are anxious to experience a rare lushness in a region where rain and greenery are in short supply. Once a stop on the ancient trading routes that connected the Levant to India and China, Salalah has a rich history that goes back centuries. Traders from Mesopotamia, the Persian Empire, and beyond passed through Salalah in their search for frankincense, making it a major center for trade in the coveted exotic ingredient. Pre-Islamic tombs and grave sites, some believed to be up to 2,000 years old, are scattered all over the nearby mountainsides and the present-day city, which has an estimated 195,000 inhabitants.