The designers at Volkswagen brought out the big guns for an upcoming recreational vehicle show in Düsseldorf, Germany by crossing one of their small commercial Caddy vans with a sailboat. While the Caddy Topos Sail design is not capable of traveling on water, it does feature a sailboat style deck on the roof that can be modified for relaxation and sunbathing. It even features a wooden ladder built into the glass to grant easy access to the roof. I suppose that it is clever in a stupid sort of way, but no matter how you feel about the quirky design, it is only a concept.