We celebrated our first and second anniversaries in Disneyland. We had a blast both times.
I wish I realized in the moment how precious these days really were. Our lives are so different nowadays. We rarely see each other during the week due to varying work schedules, kids, etc., so these memories are especially fond.
If I were to give a newlywed couple any advice, one of the things I would suggest would be to get into the habit of spending quality time together. Plan ahead for it, as it most likely won't magically appear. It is so important.