The Nexus, a dungeon hub, is an ice fortress found in the center of Coldarra, in Northrend's Borean Tundra. It is a column of magical energy surrounded by levitating earth-covered rings with ice caves underneath. The Nexus is an extensive series of caves and tunnels under Coldarra.

The Nexus is an entry level 5 man dungeon with the final boss Keristrasza awakening in the center of the dungeon.