The most ancient route, the King's way winds its way through the different ecological zones of the country, including forested highlands, open farmland plateaus, deep ravines, the edge of the eastern desert, and the warm tropical Gulf of Aqaba.

Lining both sides of this 335 kilometer thoroughfare is a rich chain of archaeological sites that reads like an index of ancient history and a biblical gazetteer -- prehistoric villages from the Stone Age, biblical towns from the kingdoms of Ammon, Moab and Edom, Crusader castles, some of the finest early Christian Byzantine mosaics in the Middle East, a Roman-Herodian fortress, several Nabataean temples, two major Roman fortresses, early Islamic towns, and the rock-cut Nabataean capital of Petra.