Elbtunnel

For a more modern perception of German engineering, you definitely need to visit the Elbtunnel. Stretching a full 426.5 meters, the Elbtunnel (24 meters beneath the Elbe River) is free for pedestrians and connects the Landungsbrücken piers in St. Pauli with the port via an unusual underwater tunnel. Once an impressive technical innovation, it now offers a direct route for city pedestrians and cyclists who want to cross beneath the river to Wilhelmsburg or the Altes Land, as well as a peaceful stroll for visitors, who often enjoy the viewing platform on the southern bank of the river. I did my own research and found a good place to visit (Rathaus, Tierpark Hagenbeck, Hauptkirche St. Michaelis, Mahnmal St. Nikolai, Landungsbrücken, Elbtunnel, die Speicherstadt (Wasserschloss + Hamburg Dungeon), Planten un Blomen)