Själö or Nagu Själö or Seili is a small island, off the main islands of Nagu, in the Archipelago Sea, off the south west coast of Finland. Själö is part of the municipality of Pargas. The island is known for its church and nature, a research institute and a former hospital.
There is another Själö in Väståboland, on the border between the former municipalities of Houtskär and Iniö.
Asteroid 2292 Seili has been named after the island.
Wikipedia https://en.wikipedia.org/wiki/Själö
Coordinates 60°14'24.413" N 21°57'43.291" E
