The hall of Valhalla is a large fortress found in the dimension of Asgard. In times of peace, the Valkyries reside in its chambers. Deities of war and strife also take residence in the hall from time to time, though its permanent master is none other than Odin. His dog-sized ravens Huginn and Muninn fly to and fro, delivering both free and secret information.
Those who wish to travel to Valhalla typically do so for three reasons. The first is for the magickal knowledge of the deity Odin, the second would be for fighting matches against entities from throughout the realms, and the third would be for secret information gleaned from Huginn and Muninn.