The Edge of the World is a cliff that ends in mid-air. At Jebel Fihrayn, roughly 90 kilometres northwest of Riyadh, the hard caprock simply stops and the ground falls some 200 metres to a plain that runs flat to the horizon. A squat promontory of rock juts out into that open air, and you can walk to its tip and stand with the drop on three sides. The escarpment behind it, the Tuwaiq, curves for 800 kilometres down the spine of the country, and this is where its western face is most abrupt. The pale rock underfoot was a coral reef about 165 million years ago, grown by corals, sponge-like stromatoporoids and shellfish on the floor of a warm Jurassic sea. Arabia was lifted and tilted westward as the Red Sea began to tear it away from Africa, and wind and rain have been eating at the face ever since.
Most people come for the last hour of light. The cliff faces west, so the sun goes down straight out over the plain and the limestone shifts from honey to copper; anyone standing on the promontory turns into a black silhouette. The plain below is not empty either. Pale dry wadi channels braid across it, and Bedouin herders still graze camels down there. Nothing up on the rim is fenced, and the site has never officially opened. It was listed as closed after a fatal crash on the escarpment in 2021, yet crowds arrive every weekend. Camping is what draws most Saudi visitors, and since December 2025 that camping requires a free national permit. Walk the rim away from the promontory and you can find the cracks where the next slab is preparing to fall.