Brookmill Park Lake, Britain, when there was no algal problem.

Detailed Description
This picture show Brookmill Park Lake, a pleasant country lake in a public park amid the urban settings near Greenwich in Great Britain. Water in the lake comes from streamflow from a nearby river. Certainly a pleasant pastoral setting for any person or duck. The picture, taken in October 2008, shows Brookmill Park Lake during normal conditions.
Sources/Usage
Credit: Mike Quinn via Geograph U.K.