I'm with brendajos, they are all great and so close. DH and I drove from Maryland to Maine, stopping in every state along the way in about 11 days. We loved it!!! I must say, New Hampshire and Vermont are abosulety gorgeous! We were mountain biking a lot, so we got to see a lot of the land and forests. We also made it a point to visit tons of waterfalls along the way. We've been talking about going back in the fall to see the leaves...maybe next year. (we need a dreaming emoticon!) Bar Harbor in ME was our last stop, and it really let us down. We saw so many beautiful things in so many other states.
I highly recommend the mansions in Newport. They are amazing! We saw fireworks on the 4th of July in Burlington, VT, which was a nice little town, although we didn't get to see a whole lot at night. We didn't go to Boston, but I've been before, and that's a pretty interesting city as well. Lots to see and do! Salem was really interesting as well.
Find me on Ravelry
On the Needles:
Monkey's in STR Titania
My So Called Scarf in Manos del Uruguay 115 (Flame)
Wonderful Wallaby in Berroco Ultra Alpaca
Dale of Norway Sheep Sweater