I started with a Dali painting.  I made a mask of the people so that I could put stuff behind them.  I added contact shadows for the objects that I put into the scene.  I also adjusted the color and blurred the objects so that they would look like they belonged in the scene.  

The new CSE building.

I replaced a head with Einstein's head.

Some kitties.

The Spaceneedle.

A Honey Bucket.

A bird.