When my best friend Sam and I were younger, before we had cars, we used to go exploring around her neighborhood. We'd ride bikes to the 7-Eleven or the library and do photoshoots in the fields behind the baseball stadium. Neither of us had a lot of friends at that point in our lives, but we had each other, and that was enough.
Sam and I have cars now, and money, so we have a few more options for things to do when we get together, although we still usually stop by 7-Eleven at some point. Even though we can go beyond Sam's backyard, we decided to throwback to the old days and do a little wandering close to home.
We climbed a fence, got yelled at when Sam started smoking too close to some building (yes, really), climbed through another fence, bushwhacked our way through a bunch of overgrowth, and wandered near a stream before going back to Sam's place. Then we hung out in her backyard with the chickens. You can't go wrong with chickens.
We had a great time, running around like we were kids again, not giving a crap about what we were doing or where we were going. Next time you're at a loss for something to do, remember that your backyard was once a great kingdom where epic journeys unfolded. Forget logic and anything else your "adult brain" tells you, find your way back to that place, and go on an adventure.