طريق البخور
Frankincense and myrrh, two spices highly prized in antiquity as fragrances, could only be obtained from trees growing in southern Arabia, Ethiopia, and Somalia. Arab merchants brought these goods to Roman markets by means of camel caravans along the Incense Route. This Incense Route originally commenced at Shabwah in Hadhramaut, the easternmost kingdom of South Arabia, and ended at Petra. Strabo compared the immense traffic along the desert routes to that of an army. The Incense Route ran along the western edge of Arabia's central desert about 100 miles inland from the Red Sea coast. The Roman Pliny the Elder stated that the journey consisted of sixty-five stages divided by halts for the camels. Both the Nabataeans and the South Arabians grew tremendously wealthy through the transport of these goods destined for the Roman Empire.