Built in 1907, the Elbe Tunnel was the first tunnel under the River Elbe in Hamburg and was considered an engineering masterpiece at its time for being 24 meters under water level;. Although it used to be the only way for carriages to get across the river without the use of a boat or a barge, modern traffic has been diverted to other tunnels and the Elbe Tunnel sees fewer than 900 cars a day.
Inside the tunnel 
Inside the tunnel
The raised curb on either side is used by pedestrians and the occasional car comes through the narrow road that was originally designed for horse-drawn carriages. Since there’s only one lane down the tunnel controllers at either end of the tunnel switch the direction of the tunnel depending on traffic demand. Vehicles are hoisted up and down the tunnel via three large elevators on either end and foot traffic is served by a pair of passenger elevators. Using the stairs is strongly discouraged.
Car elevators 
Pedestrian entrance hall
