Example: https://en.wikipedia.org/wiki/Grand_Central_Terminal#Grand_Central_North
There is a mapframe used with some symbols. On the desktop I expect to see some text, when the mouse is located over the symbol, but no text shows up.
Mouse Over works when you click on the map, there I see something like "45th Street entrance"
https://en.wikipedia.org/wiki/Grand_Central_Terminal#/map/1