Remember when you were young and you sometimes did irrational unplanned things.
Those things are still fun when you are old.
@Mathias My favorite vacation was completely unplanned.
We drove northeast, away from home, for two hours. Then we asked ourselves, "Which road looks best?" And we took it.
For 10 days, that was what we did. At every intersection we took whichever road looked interesting. Stopped at anything along the way that looked fun. No goals. No plans.
Had an amazing time!