There are so many places I would like to see and still plan to see, but of the places I have already been I would recommend:
1.) Acadia National Park, particularly the areas the tourists don't usually go. I have been there countless times and will go countless more.
2.) Blue Mountains in Australia, not far outside Sydney. Think the Grand Canyon only densely populated with Eucalyptus trees and a blue hue. It is world heritage site.
3.) Gettysburg. It is so powerful to stand there and think about the battle that occurred.