If you thought you knew all there was to know about Porsche, think again. In this two-part series entitled Porsche Museum Secrets, Porsche reveals a secret compound, situated next to their magnificent Porsche Museum in Stuttgart. The space is a hanger like storage warehouse, acting as a facility to temporary house, maintain, and rotate archived vehicles. Unfortunately, this building is not open to public, however Porsche took a film crew inside to give us a glimpse of rare vehicles, including concept cars and race cars that are probably unseen by many enthusiasts today. Take a trip back in time by clicking play on the video below.