How did the Nabataeans build their rock-carved tombs?
The Nabataeans took full advantage of the layers of rock that surrounded the city. Because these layers are comprised of alternately hard and soft layers, Nabataean masons were able to carve large, open spaces out of the soft layers and use the harder layers as structurally stable ceilings and floors. The rock-carved structures were therefore shaped in large part by the geological formations that surrounded them.