Here's a cute story to brighten up your Sunday. Tenen, a Dwarf Warrior in Modan Co on Moon Guard, decided that he would start at level one and only explore. No quests, no killing mobs, no PvP. Just exploration.
Seventeen levels later, he's explored every single outdoor zone in the game, and completed the World Explorer achievement. So if you wanted to know how much XP you could get just from exploring, there's your answer. It took four days of playtime to accomplish.
Of course, he couldn't do it all on his own; aside from the ravenous mobs, some areas are simply inaccessible without a flying mount. He got some summoning help from a cooperative Warlock. The Charge skill was also apparently useful in getting to some hard-to-reach places.
Congrats to Tenen! It's always nice to see players do something a little different.