My mom sent me a picture of the Magdeburg Water Bridge (German: Wasserstraßenkreuz) which got me googling it on the web. The fun part is that is we know people who live there! Awesome! I did not know about the bridge. It is really an amazing feat! Here is a video, an article about the heavy plates used in construction, a whole bunch of google photos, and even some satellite photos.
The Magdeburg Water Bridge