Also known as Siq al-Barid, it is an archaeological site located 15 km north of Petra with which it has been related.Like Petra, it is a Nabataean place, with carved buildings on sandstone canyon walls. As its name suggests, it is much smaller, consisting of three wider open areas connected by a 450 meter canyon. It is part of the Petra Archaeological Park, although accessed separately, and is included in Petra's inscription as a UNESCO World Heritage Site.The purposes of some buildings are unclear. , archaeologists believe that the entire complex was a suburb of Petra, the capital of the Nabataeans, intended to house trade on the Silk Road. After the decline of the Nabataeans, the place remained empty for centuries, used only by Bedouin nomads.