Saab Bilmuseum is a must for car fanatics and Swedish design buffs. At this warehouse-showroom, gleaming Saab car models span the first (a sensational 1946 prototype) and the Sonnet Super Sport, of which only six were made between '55 and '57, to the futuristic Aero X – the BioPower Hybrid Concept that's the first car in the world to run on bioethanol and produce no emissions whatsoever.