If it was flowing the other way, it would be a right-side-up delta. So the Nile River, it flows from, you could say, eastern Mid-Africa up into the Mediterranean Sea. And because it has this northward flow, the southern parts of the river are upriver, and they are actually called the Upper Nile. So the Upper Nile is actually south of the Lower Nile. Of the Lower Nile. And once again, that's because the Upper Nile is upriver. It's also flowing from higher elevations to lower elevations.