I think inner space is underrated.
I told a friend I'm hoping for a week off next month and first question is where will you be going?
Maybe because I'm older and I've gone and done a lot, but nothing seems as calm and peaceful as kicking at the house.
Play some guitar, maybe play with some raspberry pis, cook some, clean some, video game some.. maybe it also allows for introspection and thinking and maybe that's what I like the best about it.