The Georg Thiele was a technological masterpiece, but it is a shipwreck, lost to the sea in a Norwegian Fjord after running aground during a naval battle in WWII.Also in this episode, a mysterious concrete giant which echoes the Communist era atop a mountain peak in Bulgaria, a fantastical structure built in the middle of an American river, and one of the world's first and finest Artic feats of engineering, The Miles Glacier Bridge in Alaska, which, when it was first built in the early 1900s, was known as the Million Dollar Bridge.