It's certainly nothing wrong with a walk in the park or reading a book, except that a person has already decided what his/her vacation is going to be.
I find it rather sad that out of hundreds or thousands of choices how to use their free time, a lot people are so beaten down by the routine that they are content with a passive, consumer-like use of their days. They can't even imagine doing something a little crazy, stupid, frightening, generous, and remarkable. Something about which they (and others) would say "this is a bad idea" or "it might not work".
Not even for a moment.
Instead they could leave the doors of possibility open so that even after 5 years they would remember it as "I cannot believe I did it."
PS Limited time offer of Practice Guide of Wär Gott nicht mit uns diese Zeit by Johann Nicolaus Hanff ends tonight.