You don’t know? Ooooh! You’re missing out!
Like being outside?
Like a Challenge?
Like dressing up as a pirate?
Ok, the last one’s not a requirement! Nothing to stop you if you want to dress like a pirate though!
I’ll write a great intro to the sport/hobby/obsession real soon. In the meantime click through to the Geocaching.com homepage and watch the short video. It’s a good (if somewhat simplistic) explanation.