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 erosion of the sandstone by desert winds. However the proposal, though acknowledged to be extremely elegant, was rejected. The salvage of the Abu Simbel temples began in 1964 by a multinational team of archeologists, engineers and skilled heavy equipment operators working together under the UNESCO banner; it cost some US$40 million at the time (equal to $300 million in 2017 dollars). Between 1964 and 1968, the entire site was carefully cut into large blocks (up to 30 tons, averaging 20 tons), dismantled, lifted and reassembled in a new location 65 meters higher and 200 meters back from the river, in