If you’re a car enthusiast then probably visiting Germany is a must for you, and we understand that since the most popular automakers nowadays have been born there. One of the place you’d love to see in Germany is this Porsche Museum in Zuffenhausen, outside Stuttgart. The imposing modern structure sits among the various Porsche HQ buildings and 911 production, filled with the greatest hits of Porsche's production and racing history. However, what you can see in the Museum is but the tip of a very deep iceberg. A short drive away in a top-secret location is what you could call the museum vault. Here is where Porsche keeps all its concept cars, prototypes, design studies, promotional cutaways and race cars that can be pulled out for use in the museum or shipped around the world for marketing and PR purposes.