THE DAILY POST can today reveal these exclusive photos taken of the full size submarine created for blockbuster Captain America.
Comic enthusiasts and film fans have eagerly awaited proof of a boat that was rumoured to have been built at Stanley Dock.
But heavy security meant the large Liverpool set for the upcoming Marvel film was kept under wraps.
Our exclusive photograph reveals a Hydra submarine in the Dock - used by the fictional terrorist organisation Captain America battles against.
The dock area was transformed into 1940s New York before cast including actor Chris Evans arrived to film the Marvel Studios blockbuster, Captain America: The First Avenger.
The star, who plays the title role and has already had a high profile superhero part in Fox’s Fantastic Four films, was photographed heading to work on the movie – in prosthetic feet – on Monday.
There was speculation Hollywood film bosses would build a full size German U-Boat inside the closed set.
See more pictures--->