Exploration of the Valley of the Kings standing for King's Valley, (although the maps show 28 entrances, some of which were unexplored). These paintings and maps were later published in 'The Topography of Thebes and General Survey of Egypt', in 1830. At the same time James Burton explored the valley. His works included making KV17 safer from flooding, although, he is better known for entering KV5. Champollion himself visited the valley along with Ippolito Rosellini and Nestor L'Hôte, in the Franco-Tuscan Expedition of 1829. The expedition spent two months studying the open tombs, visiting about 16 of them in total. They copied the inscriptions and identified the
Valley of the Kings World Heritage Site, along with the rest of the Theban Necropolis. Exploration, excavation and conservation continues in the valley, and a new tourist centre has recently been opened. The Valley of the Kings is situated over 1,000 feet of limestone and other sedimentary rock, which form the cliffs in the valley and the nearby Deir el-Bahri, interspersed with soft layers of marl. The sedimentary rock was originally deposited between 35–56 million years ago during a time when the Mediterranean Sea sometimes extended as far south as Aswan. During the Pleistocene the valley was carved out of the plateau by steady