Re: Is Svartalfheim and the other Nine Realms what you expected them to look like?
Probably wasn't ALL hollow, but if it were an Ice planet I'm sure the Jotuns could make all kinds of caverns under ground instead of buildings over head seeing as they did have the Casket for probably Centuries before Odin got it.
Responsibility, Duty, Honor these are not
mere virtues to which we must aspire
they're Essential...to every soldier
....to every King.
Coulson, "If the details of this gets out, the operation would be complimized"