That looks amazing.
Here's what I have as of today. I plan on building it up and recreating it into something nicer, but I wanted to start out with something simple before I really went all-out designing and investing money. For the front view picture, it kind of gives the illusion that there's an inch or so of very wet, muddy soil, but it's just the camera playing tricks. The temperature is on the rise and will be playing with it to achieve the ideal day/night temps with a dimmer I have for the UTH.
I'd like to add another hide for him, but I'm not sure where or what to go with. Newbie advice welcome. Again, the examples of your tanks are great.
Top and bottom view. Critiques and suggestions welcome.