What is the Oculus in World of Warcraft

The Oculus is a 5-man wing of the Nexus in Coldarra (a subregion of Borean Tundra in Northrend) designed for level 80 players. The Oculus a series of "magical rings" that float above the ground and the first instance to allow players the use of certain flying mounts. The gate of the oculus is located directly above the nexus gate, requiring the rampway to reach.