Even for those who have seen Mount Vernon, the new visitor's center and museum (which opened 10/27/06) make a return visit mandatory. Of course, the mansion and grounds are amazing, and the tour guides knowledgeable, but with the additions, one can spend a whole day there. The musuem has a lot of artifacts (including Washington's dentures) and interesting information about George Washington's life. There are also several films to watch. There is also a learning center where forensic scientists were able to recreate what Washington looked like in his earlier years (previously undocumented). A great place for kids and adults alike.