Why would it be digitally enhanced?

Lake Mapourika is located on the West Coast of New Zealand's South Island. It lies five kilometres north of Franz Josef Glacier, and drains into the Okarito Lagoon. It is the largest of the west coast lakes, a glacier formation from the last iceage. The glacier melt waters no longer drain into the lake, it is filled with fresh rain water which runs though the surrounding forest floor, collecting tannins,giving it its dark colour. As the winds of the region sweep high above the mountains of the Southern Alps, the water is left unruffled and quite reflective of the forest on the lake finges.