okay so i have family in new york city and friends in denver that i am going to visit over the summer. ive only been to nyc a couple times and have never been to denver. are there any places i should make sure i go in the 2 cities? i am in both places for around a week so i will have time to go pretty much everywhere. ill mainly just be in downtown denver but ill be all over nyc. thanks in advance. Oh, and can i take my camera bag as a carry-on or do i have to put it with the rest of my luggage?