Hello, I'm currently creating a new world and I'm now trying to create a map for it, and I was looking for some examples and found here a map for a fictional country called Pollexia created by username Heruca and I was blown away. It was so well done. So I'm wondering if you guys could recommend me some tutorials from the forum to create something similar.

I use Photoshop CS5.

You can see the Pollexia map here: Pollexia - by Heruca