Valley of the Kings rains. There is currently little year-round rain in this part of Egypt, but there are occasional flash floods that hit the valley, dumping tons of debris into the open tombs. The quality of the rock in the Valley is inconsistent, ranging from finely-grained to coarse stone, the latter with the potential to be structurally unsound. The occasional layer of shale also caused construction and conservation difficulties, as this rock expands in the presence of water, forcing apart the stone surrounding it. It is thought that some tombs were altered in shape and size depending on the types of rock the
Valley of the Kings WV25 may have originally been intended for him. With the return to religious orthodoxy at the end of the Eighteenth Dynasty, Tutankhamun, Ay, and Horemheb returned to the royal necropolis. The Nineteenth and Twentieth Dynasties saw an increase in the number of burials (both here and in the Valley of the Queens), with Ramesses II and later Ramesses III constructing a massive tomb that was used for the burial of their sons (KV5 and KV3 respectively). There are some kings that are not buried within the valley or whose tomb has not been located: Thutmose II may have been buried