Nunavut

Toronto architect Reza Aliabadi took a trip into the far northern reaches of Nunavut, Canada's Inuit territory. There, the flatness of the tundra and the stone stacks made by the Inuit inspired him to propose a stacked housing tower.

On Canada's arctic Baffin Island, engineers are preparing to construct the world's most northerly railway, a 143 kilometer line across permafrost to transport iron ore to Europe.