They're all over the map. In addition to the submarine Lotus, car/boat chimera and all, they produced the Rinspeed Yello Talbo in 1996.
http://www.carstyling.ru/en/car/1996_rinspeed_yello_talbo/
carstyling.ru has the right sidebar that contains links to everything Rinspeed has done in-house and for others (at least since 1994), right up to the Oasis.