Since I first saw it, I have wanted to try this technique, to make normal photographs look like they are photographs of a miniature model. There are some good examples here. This is also called Tilt-shift miniature faking.
Using this tutorial, I've made my first attempts. I'm not convinced by them, but I'm getting the idea, and will keep working on this. Enjoy my experiments, anyway.
Choosing the right photos to use can be tricky, too. Photographs taken from above will suit the method more, as that is how photographs of miniature models are usually taken. I think I need to find a high-up spot and take some images for this very purpose, cutting out sky and smoke and such things which detract from the fake-realistic possibilities.