What is the Coldarra in World of Warcraft

The Coldarra is a rather large sub-zone in Borean Tundra featuring the Nexus/Oculus Instances and the 10 man raid Eye of Eternity. The area is reached via quest during which you grab the fligh point at the Transitus Shield, so you can come back anytime. You must discover the flight path at Amber Ledge before you can discover the one at Transitus Shield.