Mood Boards, Polishing My Idea, A few sketches

So after a little think about it, I still want to go ahead with Mayan civilization.

I want it to take all the traditional Mayan buildings. And take them to this rocky icy planet. I want it to be dark, lots of shadows, creepy. Which shouldn't be hard considering the weird statues and sculptures they had. 

I wanted to use this idea of a sculpture of a weird creature with it's mouth open, it being the teleport to another world. 

I don't want any plants or anything green there. Just rock and ice, maybe a bit of snow. 

Here's just a couple of Mayan structures etc.

Heres a few photographs of mountains. A few screenshots of Skyrim ruins and mountains which seems to be a huge influence at the moment.

Here's just some interesting stairs. Doesn't have to be a boring usual angled at 90degrees step.

I want it to be breathtaking, look cold, maybe a little darker than most of those but very similar. 

From here I started doodling and here are a couple of images from my sketchbook.