While sailing along the Bosphorous River try not to look over the side of the ship because if you do you will see piles of rubbish floating by. You might wonder where it all comes from --well --you only have to look at the rubbish lying in the streets alongside the river to know where it comes from. Istanbul must be one of the dirtiest cities on the planet. We walked back to our hotel from our cruise and saw kids kicking plastic bottles along the streets and people just throwing their cigarette butts to the ground. I suspect it about time a deposit was placed on plastic water bottles. No such need for a deposit on beer cans as beer is a very scarce commodity in this city--although I did find a restaurant prepared to sell it even though it wasn't on the menu---it came in a disguised metal mug!