I've wanted to do this one for a little bit to give you an idea of how big the game is going to be when completed. With the Beta announced, I figured, why not? ;D
So here's an edited picture of the actual Excel spreadsheet I've been using to map out the game world:

It might look pretty sizeable, but it's definitely not a 1 block to 1 room scale - there will be a lot more space to cover than what's shown here (especially when it comes to dungeons). I've also named the areas that have been previewed here, in the demo, or both - except for Gianna itself, which is the starting area... as you might expect.
Not only that, but I've edited out eight of the more secretive areas of the game, each at least as big as the ones shown here.
Now, if we cut the map down to what will be in the Beta...

Hey! That's almost half of the first image, don't you think? Maybe a little more than that?