Arena Where????

Is there any other PvP arena except in Ascalon and is it near Diessa Lowlands,and for what levels is it?

There's the shiverpeak arena, which is northwest (through two other instances) of Diessa lowlands. Get to Yak's bend, and an NPC there will teleport you into it. The level limit is 10-15 I think.

If you go to your guild hall and press M (map) you'll see the main PvP area of the game.

Prophecies has : The arena at Yaks bend + ascalon.
Factions has : The one in shing jea.
Nightfall has : The one in kamadan.

Core arenas are : Random arenas (4 player arena , randomly generated teams)

Team arenas (4 player arena, enter with a team) these two arenas Give "gladiator points" which go towards Gladiator title track.

Hero battles (you enter with 3 of your heros, fight against another player with 3 heros and capture shrines / kill for points , Commander points for winning ranked matches, there is also tournaments)

Heroes Ascent (a.k.a HA , 8v8 player arena win enough times and you might get a shot at hall of heroes, Each match you win gives you 1 fame which goes towards the hero title track, at rank 3 hero you get an Emote which you can use with /fame.)

Then there is Zaishen / Zaishen Elite, which are 4 player teams vs AI, only useful for balthazar faction.

thx for helping!