Train Yard: Unreal3 Demo - This is a test level I threw together back in 2008 to learn about the Unreal 3 engine. I whipped this one up in about 3-4 days (not counting the train engine which I completed earlier).
I recently dug back into this scene to spice things up. I've re-layed out the scene to include a collapsing warehouse and big cactus monsterl. It's still very WIP, but here's a doodle of where it's headed:

And here's a WIP of the monster scene in UDK:

My skydome from an earlier experiment:

Skydome(1.9 MB)

Here's the original scene: