
click to enlarge
One of the first raid instances that comes to mind immediately is
Onyxia's Lair. It is also one of the first original instances ever created in WoW, but despite it's age the instance never fails to entertain players on both the Horde and Alliance side. Onyxia is a crafty dragoness, who has used all her power to manipulate mortals and dragons alike for her own ends. While her lair is not the most breathtaking, fighting Onyxia herself is what makes this instance extremely enjoyable. She has been crafted visually to exude the epitome of dragonkind, and she plays the part well. There is of course, the afterglow players can bask in as her head is hung over the gates of Stormwind or Orgrimmar following her defeat. Although you can take her on at level 50, you'll most likely want to be level 60 for this one. Ironically, Onyxia's level is stated to be 500, but it's scaled down to within three levels of the players dynamically.