In the 1970s my cousin and I used to travel to the coast in a combi and spend the weekend at the beach. I dug through the old negatives from the time and came across the 2 bottom pics, I couldn't find one of the combi so I downloaded one from DA and inserted it into another of my beach shots. I then gave the top pic an aged and light leak effect to match the 2 bottom images.
Combi Wandering Mind Stock http://browse.deviantart.com/resources/?q=combi#/d3y3uc3/
Texture from Shadowhouse Creations shadowhousecreations.blogspot.com/
Photoshop CS5 used to create triptych.