In 2000 UNESCO inscribed the Land of Frankincense in Dhofar: the ancient city of Al Baleed on Salalah's shore with its Frankincense Land museum, the old port of Sumhuram at Khor Rori, the wild frankincense trees of Wadi Dawkah and the caravan oasis of Shisr. A full day tells the story of ancient Arabia's most precious trade.