The Heisenvald Ridge is an area located in the Arctic. Sven Olafson led an expedition with three of the Cavendish brothers, as well as the aging Professor Trevor Bruttenholm. They were nineteen days out of Bull Harbor, fifteen of which was spent on an icebreaker ship and the remainder on a snow tractor. By the time they got to the Heisenvald Ridge, they had to go the rest of the way on foot. (Hellboy: Seed of Destruction 1)