Blidö is an island in the Stockholm archipelago and a part of the Norrtälje Municipality. Its northernmost point is called Kråknäset. Journalist and author Ture Nerman owned a summer house on Blidö from 1919 until 1969.
Wikipedia https://en.wikipedia.org/wiki/Blidö
Coordinates 59°36'56.857" N 18°54'58.522" E