Since i like exploring i would like to see the following.
(plz don´t flame if suggested before)
A treasure chest that spawns random each week somewhere in Tyria with some real good loot that makes it worth the hunt.
The first one to find it gets the reward and a title"Treasure Hunter" ?
The Chest would vanish after the first persons finds it and not appear until the following week. That means only one person each week would be able to get the loot and title making it somewhat “rare”.
PS: I know there is jumping puzzles with chest rewards but that is not quite the same since you can find location etc. through google.
This event would be completely random with no help from guides/google.