Why unique? Because it's the world's oldest still operating gaming establishment, founded in 1638 and since the 1950s located on the Grand Canal in the late-15th-century former doge's palace Ca' Vendramin Calergi (which is also, incidentally, the last home of 19th-century German composer Richard Wagner). Patrons can play various forms of roulette and card games as well as slot machines, and dine at two restaurants. More info here.


(Casinò di Venezia)