Where in the World? Did TCG World show us what the Islands look like?

On Friday's AMA (#29) we got a video showing how advanced the graphics have become. But one question I had - where in TCG World is this? Is this development on the Islands south of the Forest we just saw on the Facebook Live and nobody has mentioned it yet? It's gotta be, right?

So we see some island shape.. if I had to guess where on this map it is...

I'd guess south of the Port.

What do you think? Did we see an island.. or was it part of the mainland?