Zem'lan is a port in Vol'dun in the southwest, where there a whoel bunch of skellie pirates. The achievement, Scourge of Zem'lan, requires you to pick up 3 buff items and run around killing pirates with Ol' Bonebite, who spawns after you have all 3 buffs. Each buff lasts 10 minutes, so get them quick!
The map spawn on the floor or on walls - Wowhead had some spawn locations. Hats were around on boxes, and the drink was everywhere!
Anyway, you can see Ol' Bonebite here with me as I killed my last skellie - thanks to HK again for being dragged around to my achievement (which he got as well) but at least with him around I could kill stuff a lot faster!
