The following has totally inspired me:
http://www.environmentalgraffiti.com/news-13-incredible-snapshots-lost-ancient-cities?image=13 1. Sanchi, India
2. Machu Picchu, Peru
3. Stonehenge, England - Already done. It was wet and sheepy, but so much fun.
4. Great Zimbabwe, Africa
5. Palmyra, Syria
6. Nimrud, Iraq
7. Tanis, Egypt
8. Pompeii, Italy
9. Angkor, Cambodia
10. Petra, Jordan
11. Ephesus, Turkey - Already done. Beautiful
12. Persepolis, Iran
13. Palenque, Mexico