We have https://www.openstreetmap.org/way/236147604, a way tagged with amenity=fountain

The wiki page for amenity=fountain has some clues for how to tag this better. Perhaps adding natural=water would do the trick. It may be even more accurate to make the fountain a node in the middle of a pond way

https://wiki.openstreetmap.org/wiki/Tag:amenity%3Dfountain#How_to_map