Cool down on hot days in Bordeaux's iconic water pool. Covering an area of 3450 square meters of black granite on the quayside opposite the Palais de la Bourse and its harem of elegant 18th-century palaces, the sensational Miroir d’Eau or "water mirror" provides hours of entertainment on warm sunny days when the reflections in its thin slick of water – drained and refilled every half hour – are stunning. To add to the fun (and photo ops), a fog-like vapor is ejected for three minutes above the water pool every 23 minutes. Don't be shy.