Looks pretty cool, layout seems to have changed a lot since a9, my only real concern is around the part with the water. Oh, and the eagle circling the cart is just plain awesome. Well, onto graphical problems
Some light leaking through here.
Weird nodraw or areaportal error?
These areas need some detailing, at the moment they look very plain. Same building, just different areas within it.
I realize this is a fairly unrealistic game, but these just bother me how long they are without ANY type of support.
Need an env_cubemap in this spawn.
A moon on a small building like that usually signifies an outhouse... and for an outhouse to be useful you need a door on it!

Also, they're dropping a deuce, not lighting a fire, so you should get rid of that particle effect on top. Leave the prop though.
You can jump onto the very edge of this roof.
You need to find a happy medium for your displacement roofs also... Neither of these are roofs.
The fan needs to be playerclipped if it isn't already. When you crouch while over top of it your screen starts to shake and do weird things.
Have the whole part of the cart going upwards the animation... Having it along the track paths just looks silly if it stops on one of them.
And one final note; quite a few of your walls on your wooden buildings are a little too thick, try taking them down from 16 units to 8 units. And don't forget to add those interior details to make them look less blocky!
Hope this helps, I look forward to seeing how this playtests, and the next version! :thumbup1: