Had a client that required a series of "Alice in Wonderland" pictures where I had the complete freedom to think of ideas.
With such a topic you literally have freedom to think of any situation no matter if it defies the laws of physics or depicts subjects that are different in size in real life.
This one involved a bit of 3D (the islands and the stairs) and also hand drawing (the ground). I used Blender for the 3D work and I'm far from being a good 3D artist. The girl and the dog have been photographed separately.
Here's a time-lapse of the process: