Overland Silk Routes

As it extends westwards from the ancient commercial centers of China, the overland, intercontinental Silk Road divides into the northern and southern routes bypassing the Taklamakan Desert and Lop Nur.

The northern route

The northern route began in China at Chang'an (modern-day Xi'an). The route travels northwest through the Chinese province of Gansu from Shaanxi Province, and splits into three further routes, two of them following the mountain ranges to the north and south of the Taklimakan Desert to rejoin at Kashgar; and the other going north of the Tian Shan mountains through Turpan, Talgar and Almaty (in what is now southeast Kazakhstan). The routes split west of Kashgar with one branch heading down the Alai Valley towards Termez and Balkh, while the other traveled through Kokand in the Fergana Valley, and then west across the Karakum Desert towards Merv, joining the southern route briefly.

One of the branch routes turned northwest to the north of the Aral and Caspian seas and on to the Black Sea. Yet another route started at Xi'an, passed through the Western corridor beyond the Yellow Rivers, Xinjiang, Fergana (in present-day eastern Uzbekistan), Persia and Iraq before joining the western boundary of the Roman Empire. It has been recorded that the northern Silk Road caravan route brought to China many goods such as "dates, saffron powder and pistachio nuts from Persia; frankincense, aloes and myrrh from Somalia; sandalwood from India; glass bottles from Egypt, and other expensive and desirable goods from other parts of the world."

The southern route

The southern route is mainly a single route running from China, through Karakoram. Today there exists an international highway connecting Pakistan and China, known as "Korakoram Highway." The route then continues to the Turkestan–Khorasan region, Mesopotamia, and into Anatolia, with southward routes enabling the journey to be completed by sea from various points.

The branch which crosses the high mountains, then passes through northern Pakistan, over the Hindu Kush mountains, and into Afghanistan, rejoins the northern route briefly near Merv. From there it follows a nearly straight line west through mountainous northern Iran and the northern tip of the Syrian Desert to the Levant, where Mediterranean trading ships plied regular routes to Italy, and land routes went either north through Anatolia or south to North Africa. Another branch road traveled from Herat through Susa to Charax Spasinu at the head of the Persian Gulf and across to Petra and on to Alexandria and other eastern Mediterranean ports from where ships carried the cargoes to Rome.