Niccolo' Bertoldi
Google
Truly a hidden gem! A wonderfully rich museum, like you would not expect from the outside, with an incredible quantity of naval model (many of which well over 1, 2 or even 3 meters in length) and historical vessels (like the Lehg II, a 9.50 m ketch that was sailed around the world in 1942 by Argentinian Vito Dumas, the bridge of the ARA Alférez Sobral, almost destroyed in the South Atlantic War of 1992, and a french-made Exocet missile, like the one that sank the cruiser General Belgrano in the same war). The entrance ticket is lass than the equivalent of 50 cents (Euro or USD) and so it is worth visiting even if you don't have much time, but if you are interested in Naval History plan to spend there at least two or three hours.