No you guys, haligat is right. If they don't put those glory holes in the lakes, all of the water bunches up at one end or the other and looks lumpy. The glory holes are there to keep the water level so that tourists don't have to go home and edit their pictures with photoshop to make the water look 'right.'
hallgat, some do exist (the largest is in California) but this one is a p-shop parody. keep searching pixdaus and you will see the original photo (it's somewhere in France i think) without the drain hole.