How To Build an Igloo
I've always wondered how igloos are built, and this 2011 video, shot in partnership with a German clothing company, shows the building of an ice house in two days time. The video annotations are in German, but you can get a sense of kind of structural engineering and precise measurements needed to assemble the dome. As you would expect, there's a lot of ice cutting involved. More photos from the video shoot can be found here.