Some great models and photos from professional model maker and photographer Michael Paul Smith. He builds classic car models and photographs them in a fictional 1950s American town called Elgin Park. His models are so detailed that when placed in miniature dioramas and photographed using forced perspective, you'll think that they are real vehicles. His Smugmug gallery has a lot more examples.
A simple board with modeled concrete and great models in front of a strategically framed location is all that it takes to create a stunningly realistic image.