There were only two supersonic airliners, the Concorde and Russia's Tu-144. Only one place in the world lets you see them side by side. Here's a look around the huge Technik Museum Sinsheim.

The U-Boat U-17, a decomissioned German navy submarine, is set to be transported from the Technik Museum Speyer to its final destination at the Technik-Museum Sinsheim on Sunday.