To the best of our knowledge, Wrocław is the only Polish city to still retain a functional city moat, though you’d be forgiven for mistaking it for one of the many slivers of the Oder River and its tributaries - after all, this is the ‘city of one hundred bridges’. The original 13th century fortifications made use of two concentric moats; the slightly older inner one, snugly encircling the part of the Old Town that wasn’t protected by the river, was filled in towards the end of the 19th century as part of a broader effort to dismantle the fortifications, which also saw Cathedral Island (Ostrów Tumski) cease being an island. The outer moat, left largely intact, was turned into a leafy promenade, and today it is one of the nicest places in the city for an afternoon walk, bypassing the District of Mutual Respect, the National Music Forum, and Partisan Hill before terminating at Park Słowackiego.