The New7Wonders site that is an ancient city carved into rock in Jordan is Petra.
Petra lies in southern Jordan and was the principal city of the Nabataeans, an Arab people who established themselves in the region by the 4th century BC. Its dramatic buildings, tombs, temples, and monuments were cut directly into rose-coloured sandstone, earning Petra the nickname “Rose City.” The settlement also included sophisticated water channels, cisterns, and dams that helped support life in the dry landscape.
Petra flourished because it stood near important trade routes linking Arabia, Egypt, the Levant, and the Mediterranean. Visitors traditionally enter through the Siq, a narrow gorge leading to Al-Khazneh, or the Treasury, Petra's most recognisable monument. Despite its name, the Treasury was probably a royal tomb or ceremonial structure rather than a place where treasure was stored.
The city was incorporated into the Roman Empire in AD 106. Its importance later declined, and much of Petra became unfamiliar to Europeans until Swiss explorer Johann Ludwig Burckhardt visited in 1812. Petra became a UNESCO World Heritage Site in 1985 and was selected as one of the New 7 Wonders of the World in 2007.