In this article we explore the fate of high modernist architecture and settlement planning in the North, through the lens of mining towns in Sweden and Quebec. After WW2, cities across the world were subject to a wave of restructuring in accordance with high modernist ideals. The circumpolar north became the subject of some of the most radical examples, often described as utopian. In the Swedish Arctic, a renowned architect Ralph Erskine played a leading role. He combined functionalist principles, with ideas of creating settlements protecting inhabitants from harsh Arctic conditions, in harmony with the environment. Erskine...s ideas were implemented to a different extent in Kiruna and Svappavaara in north Sweden in the 1960's and in Fermont, Quebec, in the early 1970's. Our aim is to understand the challenges of creating industrial settlements in the Arctic, with the capacity to attract employees that are needed for resource extraction and other industries. While Erskine's architecture in Svappavaara and Kiruna will be demolished, the wall shaped town in Fermont is still intact and expanding. By comparing and highlighting differences, we call attention to the threat of demolition of legacies of an era that has yet to be defined as cultural heritage.