Egyptian temple Debod, as gifts to nations that had contributed to the preservation effort. Nevertheless, several other temples vanished beneath the lake. Today there are dozens of sites with substantial temple remains, although many more once existed, and none of the major temples in Lower or Middle Egypt are well preserved. Those that are well preserved, such as Karnak, Luxor, and Abu Simbel, draw tourists from around the world and are therefore a key attraction for the Egyptian tourist industry, which is a major sector of the Egyptian economy. Three temple sites—Ancient Thebes with its Necropolis, Memphis and its Necropolis, and the
Egyptian temple from the distorting effect of additional construction. Many temples, known as hypogea, were cut entirely into living rock, as at Abu Simbel, or had rock-cut inner chambers with masonry courtyards and pylons, as at Wadi es-Sebua. They used much the same layout as free-standing temples but used excavated chambers rather than buildings as their inner rooms. In some temples, like the mortuary temples at Deir el-Bahari, the processional path ran up a series of terraces rather than sitting on a single level. The Ptolemaic Temple of Kom Ombo was built with two main sanctuaries, producing two parallel axes that run