To start with: go back to Azeroth, go to Deadwind Pass (next to Duskwood in the Eastern Kingdoms), go as far south as you can in the Deadwind Pass, you will encounter a tower with a quest giver outside. For those who use coords, they are: 47, 75. And a map can be found [url=http://www.wowhead.com/?npc=17613#00zc]here[/url].

The quests can be received at level 68, not entirely sure on this, but it helps to be level 70, or to have level 70 help, to complete them.