GPS-Gadget-owning nerds have had a new game for a few years now: geocaching. Here’s how the game works: you lookup the locations of geocaches on various geocaching websites, find the geocache, take something from the cache, add something else and make a note in the frequently enclosed logbook. Typically, the caches have little value. Doesn’t sound that exciting, does it? But as one hunter put it: it’s not about the treasure, it’s about the hunt.