Riddle

51.477873, -0.0000794 (OpenStreetMap, Google Maps, Yandex Maps)

If we were to provide coordinates, for this checkpoint only one would be sufficient.
Monument on the top of the hill east of the building complex
Number of letters N

Detailed answer

The riddle is about the Royal Observatory in Greenwich, which was used as a reference point to define the meridians of the world coordinate system. There is a general Wolfe monument East of the building complex.

Answer: 9


9

Present in routes of categories Angel

Passed by: 3/14 (21%).

By categories:

  • Angel: 3/14 (21%)