I worked for Colonial Williamsburg for several years and spoke with hundreds of people a day, many of them from foreign countries. I found that Europeans were most appreciative of our Colonial history. After all Virginia was a colony ruled by England reflecting the values and society of that country. They were usually most interested in the men who spoke and met in Williamsburg, the men who were among the foremost leaders of the American Revolution....Thomas Jefferson, George Wythe and many others. Guests can visit the places and rooms where they formed the ideas that we as Americans have all come to know. Visit the George Wythe house and you will visit the house of a signer of the Declaration of Independence....it is original, just as many other buildings are. In fact they look no different than those houses in Charleston built in the same period. I was always surprised that Europeans admired the Palace when it is small compared to their standards....they also liked the Capitol and the College. Charleston has a sizeable area of 18th cent. houses, but most of it is 19th and the homes are interesting architecture as well as beautiful. As far as accomodation, chains are not very good there. Williamsburg properties are excellent at the high end... and I DO mean high. The Inn runs around $350 and up....the Lodge has just been renovated and is lovely....also costs much less. Colonial taverns great fun for meals, but don't miss the Trellis, modern restaurant near the historic area. I think your French student will gain so much more history from Williamsburg than Savannah, for example. And there is always Busch Gardens for fun. Philadelphia is a good choice however. Have a great time wherever you go!