Meet the Sealander: a caravan that floats like a boat. It has a dynamic, agile design. It has a waterproof chassis, 13″ steel rims with 185/55 tires, a hydraulic pillar, and a one-piece hull formed of plastic. The below video gives you an idea how the Sealander performs:
The Sealander is developed and built in Germany. There are plenty of optional modules available for it. You can find out more here.