Neat! Welcome to the Guild Vhesper. Have some rep to get you started!
Interesting concept and execution. Since it is in the WIP forums, I'll give you a little feedback. I think the river banks are distracting my eye and causing that inverted illusion to pop up especially in the first pic where I assume those are cliffs the river is running through, but they jump a little for me and turn into ridges. I'll have to think about the specific causes and a possible solution though as I don't have anything off the top of my head.
I like the attention to detail you put in and the concept of the frozen whirlpool is really cool. Let's hope a group of adventurers don't make it inside and summon a fire elemental.