I have been fortunate enough to have traveled all over this planet we call home. It is hard to actually put these adventures in a ranking order as they all have their own uniqueness to them. Life is perspective ... -_-
I'm in the process of becoming a "world-traveller" but my lifetime list postively pales in comparison to yours. What a great list of destinations. I'm positively green.
Wow, that's excellent! I have seen photos and read reviews about Machu Picchu. The trails with the long drops and steep steps, etc. are supposed to be dangerous if you are out of shape. You said "United States" but not where, unless you've been to all Fifty!