I might be way behind everyone else on this - you may all be aware of Les Machines de L’île i Nantes, France. We went over there for a film festival (Dimensions was playing) and were stunned by the mechanical creatures - including a giant elephant that can carry 49 people. It really was incredible to see, and they are expanding it all the time.
I've done a blog post with lots of photos and video from our trip. Have you all heard of Les Machines de L’île before?
Hope you enjoy them. I think the pneumatic caterpillar might be my favourite.