If you don't know what Utgarde is, it's likely the first dungeon you'll run through in Wrath of the Lich King if you're the instancing type. It's set in the Howling Fjord, and is a vrykul fortress from which they plan their attacks on Alliance and Horde settlements. It's the first of two dungeons that will be taking place in Utgarde, the other being Utgarde Pinnacle.
As always, if you want to see a larger version of the pictures, click the Hi Res button in the upper right of the gallery. I especially recommend that for our Northrend galleries, you simply can't see some of the detail in the low res versions.