>>8067369It's a photograph. Looking at the file name I'd take a wild guess it's Karula national park in Estonia. Could be this spot (rotate the photo about 200 degrees clockwise), 57°45'39.8"N 26°27'15.4"E
>>8054706It's not a sinkhole, it's a pond in a swamp or a swampy location. Not a botanist but my guess is the trees die because the roots drown.
