You’ve heard about the city walls that the Venetians built to keep the Ottomans at bay, but none of that would have been much use without a clean water supply.
The answer was an ingenious drinking water cistern accessed by five wells on the same square. These remain in place today, standing in a row next to the city’s bastion and a section of the battlements. The best time to check out this sight is at night, when the wells and defences are lit up from below.