Here's some environment stuff from Bill Perkins, a concept artist who has worked for Disney and Dreamworks, among others. There is more cool stuff on his site: www.highstreetstudio.com.
This is a render, but I'm not sure from which movie.
Efficient and well executed. The look/feel and animation all support the tone very cohesively.
This has a really cool & mysterious feeling, and a great punchline. Plus, you gotta love the scooter. It was done by 3 students from the Filmakademie's Animationsinstitut in Germany. Project web site.