'66°N' is the design for a large-scale ecotourism hotel that takes advantage of dynamic and shifting environmental conditions of Greenland to visually and physically register the changes in the fragile arctic environment. Located on the Western coast of Greenland near one of the largest potential sources of direct sea-level rise, the Ilulissat Ice-Fjord, the design explores the intersection of two global trends: the effects of global climate change and the increase in popularity of ecotourism in the arctic. The techniques of building in an extreme and remote environment to provide infrastructure for ecotourist activities result in a permanent structure that is subjected to the continuously shifting site conditions of water and landscape. The relationship between rigid and responsive forms is used as an architectural register to these conditions that change the patterns and use of the hotel over time.