ok i searched for pillar and arena and bem, lades edge etc and couldnt find this so if you can then w/e.
basically its the small wooden logs that are verticle on the ramps there, you can jump behind them and NO RANGED SPELL can get to you.. good place to drink/eat or restealth if your a druid/rogue. good place to bandage....especially vs full caster teams.
ofcourse you can still be melee'd, but if you are vs a warlock/druid combo for example, and you need to restealth/eat/drink/bandage... you run there jump behind the log and then do it.. they need to get into melee range to stop you doning what your doing.
this spot has saved me countless bem games when i was low on mana (i play a 1900 rated druid). most high rated people know of this, but thaught id share with the lower rated people.
have fun owning