If you go far enough north along the coast of Vanaheim (in my campaign) , you sight a ruined stone dock and an ice covered stone road.
The road leads inland. Following it, an unnatural storm decends and you are attacked by a great Icebeast ( (a Gnoph-Keh, a creature created by Sorcery years ago)
At the end of the road, magically protected from the ice, you sight the Tower at the Edge of the World. The Tower was built by a sorceror fleeing the destruction of the Elder Hyperborea (written of by Clark Ashton Smith) centuries before.
The Tower is the lair of fearsome Snow Apes.
Eventually, you confront the lich of the sorceror with an ice-cold touch that drains the life from you and transfers it to him. He can only be slain by the touch of a ice diamond gem he guards , the Stone of Eibon.
Further north lies Elder Hyperborea itself, incased in a shroud of ice.
For more info, check out the Film Sinbad and the Eye of the Tiger and CAS stories of Hyperborea.