On the Dutch branch of National Neographic Channel the “Nazi Megastructures” series was broadcasted recently. This series explores the prolific engineering achievements of Nazi Germany throughout World War II and beyond. In case you missed this, here’s a YouTube playlist which shows you the whole series. Enjoy!
Update 26-01-2014: YouTube is randomly removing videos of this series so I’ve added more sources to the playlist. Scroll around for the best quality.