Nowadays this tower holds a naval museum which displays a variety of old navigational instruments and models, as well as historical documents. It was created in March 1936 by the Ministry of the Navy, was inaugurated in 1944 with funding from the Naval Museum of Madrid. The museum occupies two floors of the body under the tower, the two rooms of the museum is shaped like a ring that rotates in tornouna central staircase that connects them.
Inside the museum one can find the set of models of boats that are exposed in the windows. Of the most important detacamos the model of the ship “Cape Horn”, the Giralda, the beautiful yacht of King Alfonso XIII, the model and drawings of the San Fernando Real, the first steamboat built by shipyards in Seville in 1917. Of the most interesting, we highlight the models of the three ships that set sail in search of the Indies captained by Christopher Columbus, on Friday August 3, 1492. Important to note the large mural traces the route taken by Elcano in its journey around the world.
In the second room, one can see the documentary section of photographs, documents of Alfonso XIII, guns out from the bay of Cadiz, one of them from the wreckage of Trafalgar.