The Edge of the World, or Jebel Fihrayn, is located about 90km from Saudi’s capital, Riyadh and drops down 1,000 feet into an ancient ocean bed. Reached through winding desert trails that run along a ridge of the Tuwaiq escarpment, it forms part of the vast Tuwaiq cliffs, which stretch over more than 600km through central Saudi, and once overlooked an ancient trade route used to cross the Arabian Peninsula from Yemen into the Levant and Persia