I know this is a while ago, but you can get into Mt. Vernon (George Washington's estate) for free on his b-day. Free just means we had to go. Unfortunately, Tyler still had class that afternoon with a quiz, so we could only stay for an hour. It was jammed. The weather was quite pleasant for this time of year. We didn't have time for a tour of the inside of his house. We will be back later this summer with some family.