ADDED:
Level only Caves
higher spawns the deeper you go, lower health and lower defence, higher attack and Exp.
(do not drop, Although boss's have rare chance of dropping "ExpCaveScroll" for a cave thats very high exp which spawns 400mobs.
ExpCave
Need "ExpCaveScroll" to enter it detect your level and place you in correct cave for your level, npc then will spawn 400 - V.High exp mobs with low Health for you to kill.
Exp/Drop Buff Scroll
10/20/30% 1/3/6Hour Exp and Drop Scroll added to drops which u can exchange in town at npc.
Cave Scrolls
Free Teleport to Cave to save you Gold.
Exp to level 40 Lowered.
Daily Boss Spawns
DeathStalker Spawns every 4hours which has high Money Drop and chance for "ExpCaveScroll