You would need to spend more than a couple of days to see all there is to see in and around Luxor and Thebes.
As the site of the ancient Egyptian city of Thebes, Luxor has frequently been characterised as the "world's greatest open air museum", the ruins of the temple complexes at Karnak and Luxor standing within the modern city. Immediately opposite, across the Nile River, lie the monuments, temples and tombs on the West Bank Necropolis, which include the Valley of the Kings and Valley of the Queens. Thousands of international tourists arrive each year to visit these monuments, their presence forming a large part of the economic basis for the modern city.
Wikimapia link to Luxor/Karnak sites
Wikimapia link to Thebes sites
Theban mapping project
Theban Digital media archive
Time in Egypt