I have just stumbledupon this fabulous site with loads of pictures of ancient lost cities.
This photographic collection is awesome and must have taken a great deal of collecting. Do take some time to visit this site and look around.
There is a brief explanation of each site and lots of pictures. The sites range from well known places such as Abu Simbel, to lesser known places like Sanchi, and little known cities, for example Lothal.
This World just gets more interesting!