Scavenger hunting is fun – some like to pick through garages and dumpsters, but if you’ve got a GPS handy, you can go geocaching. Don’t compare it to hunting for Pokemon. This is much better. If you like exploring, hiking, searching for hidden clues, and are a decent navigator, it might be the hobby for you. Did we mention that it’s pretty much free? The goal: find hidden containers called geocaches with the help of a smartphone or GPS, then…