User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-15860919-20130922030700/@comment-10901795-20130922171043

Oh, it's in the same world. check out the blog for it that someone has now sadly closed down to new blog posts just because people didn't blog for a while. Theory on it is that because the egyptians don't cross the river because it's bad luck to go on the other side of the river and that just happens to be where camp halfblood is, and the greeks don't go to sanfransisco because the mountain of despare is there there and that happens to be where camp jupiter is, and the romans don't go to Alaska because it is beyond the reach  of the gods so that will be where viking thing is