If you happen to have sand dunes next to an ocean, it looks like you can transition from one sport right into another. This dune buggy from Hyundai will convert into a jet ski:
https://www.theverge.com/2018/3/9/17096800/hyundai-kite-dune-buggy-jet-ski-geneva-motor-show-2018
https://www.theverge.com/2018/3/9/17096800/hyundai-kite-dune-buggy-jet-ski-geneva-motor-show-2018