Under Jasper’s Patricia Lake lies the remains of one of history’s most peculiar wartime experiments. Project Habakkuk was an audacious idea born during World War II, as a solution for Allied forces battling German U-boats. Though it never came to fruition, its legacy remains a chapter in Alberta’s history. Project Habakkuk was a secret Allied experiment launched in the early 1940s under the guidance of British inventor Geoffrey Pyke to build an aircraft carrier unlike any other—not from metal or wood, but from ice. Specifically, it would utilize pykrete, a blend of 85% water and 15% wood pulp. This strange new material was stronger than concrete, resistant to bullets and torpedoes, and melted significantly slower than traditional ice. …The final vessel would need 300,000 tons of wood pulp, 35,000 tons of insulation, and a staggering amount of steel for reinforcement. These challenges … led to the project’s cancellation in late 1943.