The Martian Frog Rover made from Atlantis sets and a World Racer. I used the "suspension" trick for the wheels. Originally, it was supposed to be a large aircraft, and the cockpit was going to detach etc, but it ended up being a Rover. There is a small craft that folds up and is stored in the rear.
Small craft storage. There is also a top hatch that can hold supplies or people.