Would He-Man and the Masters of the Universe make more sense if the show was set in Brooklyn? Because that's where an artist who goes by the moniker Kilroy III made an enormous snow fort modeled after Castle Grayskull. It's large enough to fit three to four adults inside. There are several more pictures at the link.
http://www.carbon-fibre.me/the_ethyr/spotlight-snowmageddon-spawns-castle-grayskull-by-kilroy-iii.html via Geekologie | Artist's Website | Photo: Carbon-Fibre Media