Hi, my husband and I are planning a road trip with my parents from Minnesota, southeast to the coast, north into Vermont and New Hampshire (we're not going all the way into Maine), taking the northern route home towards Niagra and then going through Canada on our way back home to northern MN. Our main locations and stops of interest we know we want to do for sure are St. Louis, Nashville, Newark Delaware (visiting friend), Gettysburg, Washington D.C., Boston, Vermont / New Hampshire (we don't have any specifics here but it's an area I've always wanted to visit), and Niagra Falls. We'd be traveling in July or August.
I'm looking for additional attractions and recommended scenic routes along in these areas. Not necessarily big tourist attractions, but more recommendations from people who have found their own gems in these areas or locals who know what are truly the best places to see. I don't want to spend the whole trip on big main highways but want to really see the scenery as we travel. Anyone have any tips?