Remnant is basically Australia if Australia was the entire world. I hate to imagine what the actual Australia of Remnant is like. I imagine even the air could kill you.

Imagine a grimm. Got that in your mind?

Now imagine that grimm if it were poisonous and five times its regular size.

That is what Remnants Australia is like. Luckily, there wouldn't be any Ursa or Beowolves. Just Grimm crocodiles, jellyfish, spiders, Deathstalkers, King Taiju and the occasional drunk guy.