I see 3 options here:
Either we figure out what the user was referring to, remove the tag altogether or link to some other image that can be reached by everyone like Wikipedia commons or a government website. 
I left the note because I am not a local of the area and thus have no clue were images of parks in the area can be found and couldn’t take a picture myself, that’s up to the local community in the area but I still wanted to point out the data issue since I saw it hopping that a local would see the note and fix it. 