Black and white image of the frozed Yukon River prior to break up with attached to wooden tripods spread out at intervals across the ice. The tripods appear to have cable running from it, probably to initiate siren when the ice breaks.
Black and white image of the frozed Yukon River prior to break up with attached to wooden tripods spread out at intervals across the ice. The tripods appear to have cable running from it, probably to initiate siren when the ice breaks.