You can see 7 states from Rock City near Chatanooga. There are actually 8 states that border TN, not sure if that is the most states that border another state? We have Graceland here in Memphis, which I recommend everyone visit.
I went to school in MI. The Great Lakes, along woth many other lakes pop into my mind. The one very unique thing in Michigan is Mackinac Island (pronounced Mack-in-awe) where there are no automobiles, nothing motorized, expect the ambulance and fire truck. You leave your car on the mainland and take a ferry to get there. Lots of horses and bicycles on the island. Oh, and you have never seen so many American cars on the road then when you are in MI.
I lived in FL for many years, and of course the beaches are wonderful. Having blue skies almost every day is amazing.
I grew up outside of Washington DC, and if you have never been to the Capital city I recommend it. Cherry Blossom in early April is just beauiful, here are some photos. The Cherry Blossom trees were a gift from Japan.