Museum of the Compass and the Maritime Duchy of Amalfi

Tucked inside the historic Arsenale di Amalfi, this museum dives deep into Amalfi's extraordinary maritime past as one of the Mediterranean's most powerful medieval sea republics. You'll find fascinating exhibits on the history of the compass — famously said to have been invented here — along with artifacts that bring the old Duchy of Amalfi to life. It's a surprisingly compelling stop that most people rushing through the piazza completely miss.