Mapbox recently released changes to the iD map editor that connects features to Wikipedia entries: https://www.mapbox.com/blog/id-wikidata/ Mapbox programmers decided to focus on core strength and allow Wikipedia to keep the details up-to-date.
Since the Angle Tree Stone building is on the map and the Angle Tree Stone has a Wikipedia entry, I decided to test the new feature. It took some searching to find the control for adding a Wikipedia entry because it is in a long list that is partially hidden in the interface. Once I found the control, it was easy to add the required information.
When I inspected the additions, I did not find them at first because they are sensitive to the degree of zooming. When I found the Building, Path, and Access Road, they appeared as expected. But when I tried to connect to the Wikipedia entry about the monument, I could not connect. Does it take time to rebuild the databases for this kind of information?