Always one to be pedantic. I looked up the definition of pond to see how it differed from that of a lake.
Google gave me this for pond:- “a small body of still water formed naturally or by artificial means.”
THIS gives a detailed explanation of the difference but basically it appears to be about depth rather than size.
So in order to be on the safe side I chose this picture that I took recently in London. This ornamental pond is in Victoria Embankment Gardens, the part next to Savoy Place, near the north end of Waterloo Bridge.
I also took a picture of this little chap that you can’t see in the above photograph because he is hidden by the tree fern.