Blimp. 2002. This is a still from a film I'm making, about a holiday on Mars. (No, really.) The blimp is going to take our holidaymakers on a journey over Marineris Valles, a vast canyon that stretches some 3,000 kilometres around part of the equator. This is about the distance from New York to Los Angeles, or from London to Cairo.

Click the picture for a closer view.