Today is sunny and calm and at dawn was 33 below zero, but will be warming up all day and tonight "warm" at just -10.  The sun is highlighting the drifted snow on the lake from yesterday which now look like white-caps rolling into shore.  A couple deep drifts in the yard look like I could build an igloo out of them, which I intend to try when the daytime temps warm up next week.
My Dad used to build igloos and I helped several times.  He has slept in them overnight a few times to try it out (1960's, in the yard) and once had wolf tracks right up to the door, checking him out while he slept. 
When I was in high school he would build one large enough to park the small 4-door Ford we had then, in as a garage.  It was strong enough for us kids to play around on top of it.