I don't know where to level
Go to low level zone. EXP you receive now scales with your level, at least for Dynamic Events as far as I have noticed.
Or try one of the other zones such as lornar’s pass (25-40) or herathi hinterlands (35-45). Higher levels zones do give relatively more xp/loot than low level zones.
Indeed, there should be several zones from lvl 1 to 40 that you can do. Just look at your map
Did you know that you can easily get to Ebonhawke and the surrounding areas (I believe they are also in this level range) from Divinity’s Reach, for example? There’s an Asura Gate in…ah…Rurikon District, I think?
There’s more than once zone of each level.
For around level 40, you have:
- Lornar’s Pass 25-40
- Fields of Ruin 30-40
- Harathi Highlands 35-45
- Blazeridge Steppes 40-50
- Dredgehaunt Cliffs 40-50
- Bloodtide Coast 45-55
Here’s a very useful map:
http://gw2.mmorpg-life.com/interactive-maps/
I tend to use it when I’m down to one poi to find that just isn’t visible to me, as I don’t like spoilers, but the overall home page map is a handy quick level guide.
I like the list on the wiki with approximate level ranges: http://wiki.guildwars2.com/wiki/Explorable_zone