That right there is a land fill. It's actually a huge one despite how insignificant it looks in this picture. Perhaps the reason it looks so puny is because of the colossal body of water immediately next to it. That's right, someone put a lake right next to a landfill. Classic.
Now I'm obviously a highly skilled garbologist because I've been in a class called the Geography of Garbage for 3 months, but something tells me even if I had come upon this scenario 4 months ago, my reaction still would have been, "Whooooaaaaa, stupidity. Hey guys, look how dumb that is."
What is the idea here? Let's create a huge pool for liquid runoff to drain in to? These engineers were clearly misinformed about the reliability of landfill liners. The dangers I see here are both in the easy access to groundwater pollution and, basically, the cesspool of contaminants that is now right on the surface level. They are not visible in the picture but there were birds all over the water. That can't be good. Who on earth thought this was a good idea?