On Google Maps, searching the coordinates 52.376552,5.198303 brings the user to 
Koningin Beatrixpark, a park in Almere, the Netherlands.

Upon switching to Satellite view and zooming in on the coordinates, there appears to be one man (or possibly two) dragging an unidentified object out on a dock toward a small lake.

Behind the object, stretching the length of the dock back toward land, is what appears to be a bloody streak.

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There is speculation that it may actually be two men with a wet dog, and water dripping from the dog simply discolored the wood of the deck.

There have been plenty of other weird things discovered on Google Maps.