Manicouagan Reservoir Crater

When driving around Google maps from space I noticed a strangely symmetrical circle. link

Its the Manicouagan Reservoir, known in French as Reservoir Manicouagan. A huge meteorite crater its tied for fourth largest diameter. In my opinion it is much more clearly visible than any of the other large craters on earth . . . well from space at least!

There wasn't always a lake there though, the Manic-5 dam makes this huge lake the fifth largest man-made lake on Earth (by volume). Actually, if you look for it, its so huge that you can find it on maps of North America and even some globes.