Pani Kotha (a.k.a. Water Fort, Fortim do Mar, and Alfiston Jail) is a Portugese prison positioned off-shore from the Diu Fort — between Diu island and the Ghoghola peninsula. The ship-shaped structure held prisoners — at least those that weren’t good swimmers.
Among the lesser known attractions of Diu is a wall that bisects the island from Chandrika Maa Temple in the south to the Diu Cross roundabout at the foot of the Dr Shamji Bridge on the north side. One can travel atop the wall for its entire length. [Beware the poop of many species.]