I think I would like to visit these 3 place's for a dream vacation.
1: Gotham city. I love adventure and what better place to find adventure than going to Gotham city meet Batman, Robin, Batgirl, commissioner Gordan. Plus you will most likely see Batman fight some of his most famous arch nemesis like the Joker,Bane, Ra's AL Ghul, Harley Quinn. It would just be awesome
2: Arendelle. I mean who doesn't want to go to Arendelle I mean meet Elsa,Anna and Olaf. This place would be great to go to like for instance it's really hot one day and you really need to cool off just ask Elsa to let it go and make some Snow and the solution to your problem has been found.
Last but not least one of the greatest place's in my opinion.
New York city (to meet the legendary X-men). I mean come on who doesn't want to meet the legendary X-men I'm sure wolverine wouldn't be the happiest to have visitor's but than again when has wolverine ever been happy but just think about it. Sitting and talking to professor Xavier, Cyclops, Storm, Nightcrawler,Iceman, Rouge, Angel and the list goes on. Plus you can swim with them go into their laboratory and see the X-jet and also use some of their high tech gear.