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 (Tibet) of all the kings from "Srong-brtsan-sgam-po" to "Khri-lde-srong-brtsan", including two princes . . . ." Other sources, however, have indicated that there are actually nine mounds rather than eight or ten. The kings believed to be buried at the site include Songtsen Gampo (the founder of the Tibetan Empire), Nansong Mangsten, Tridu Songtsen, Gyangtsa Laban, Tride Tsugtsen, Trisong Detsen, Muni Tsangpo and Tritsu Detsen. Two stone lion steles were erected at the front of the Valley of the Kings. Although one has been destroyed, the other is intact except for a broken leg. The lion is 1.55 meters high and