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
Abu Simbel temples ancient human civilization were under threat from the rising waters of the Nile that were about to result from the construction of the Aswan High Dam. One scheme to save the temples was based on an idea by William MacQuitty to build a clear fresh water dam around the temples, with the water inside kept at the same height as the Nile. There were to be underwater viewing chambers. In 1962 the idea was made into a proposal by architects Jane Drew and Maxwell Fry and civil engineer Ove Arup. They considered that raising the temples ignored the effect of