In the the harbour of Maó you can find witnees to another time period, marked by the different foreign rules that influenced the history of Minorca – the remains of San Felipe Castle, La Mola Fort and the former hospital of El Llatzeret.
La Mola Fort, which would later become a military prison, lies at the most easterly point in Spain. It is a very well-conserved defensive fortress, with a polygonal façade and a labyrinth-like system of moats, bunkers and galleries. Until 1968 its tunnels housed the most feared military prison in Spanish territory. It has a battery of 38.1 cm cannons which was fired for the last time in 1912.
To visit La Mola Fort you have to take part in a guided visit.