[quote=@Blubaron45]
How about the whole 'Bowl Idea' is what the mortals of our world [i]believe[/i] that's what their world looks like? 
[/quote]

Hmmm... Building on that, maybe the "bowl" is the main continent of the world, and the mountains surrounding it are so tall that everyone just assumes it's the edge of the world?  And the people outside the "bowl" initially don't really try to get inside because they believe it was made by the impact of a falling deity or something and thus is cursed land.  Hmmm...

Just random ideas, I guess.