NOT MUCH LONGER?
7 Endangered Wonders

Luxor Egypt tops the listof the 7 Most Endangered Wonders of the World:

Luxor, Egypt
Dating back to the 14th century B.C., the Luxor temple complex on the west bank of the Nile River—which includes the Valley of the Kings, the Valley of the Queens, more than 40 temples and the tombs of thousands of nobles—is threatened not only by the ravages of tourism and theft, but by the Nile itself. The construction of the Aswan Dam 40 years ago has caused salt to build up in the newly fertile soil around the temples, eroding their ancient foundations and filling many tombs with water. The World Monuments Fund is currently devising a management plan for the site, and hopes to give the complex its biggest renovation since Alexander the Great.

Also on the list is Babylon (not a surprise) and Machu Picchu.