I love GW2 because it's the best "just fucking around" MMO out (IMO). I was heading toward my next quest, saw a ruin and though "I bet I can climb that with my bunny mount" so I tried and I could. There was a vista up there which gave me XP and I found that the tallest part had a set of diving goggles. I put them on, was popped into my swimsuit ans then dove into a lake flipping on the way down. The lake had a hidden cave in it where I fought drakes and found a sunken chest full of treasure.