The city's maritime museum occupies Gothic shipyards – a remarkable relic from Barcelona's days as the seat of a seafaring empire. Highlights include a full-scale 1970s replica of Don Juan of Austria’s 16th-century flagship, fishing vessels, antique navigation charts and dioramas of the Barcelona waterfront.
In the courtyard is a life-size replica of the Ictíneo I, one of the world's first submarines. It was invented and built in 1858 by Catalan polymath Narcis Monturiol. The cafe here has outdoor seating and a decent menú del día (set-price menu) at lunchtime.