Looking at the sea charts[1] of the archipelago and following a few undersea cables, I think it might be this cabin[2], which roughly matches with a map on Glob

Looking at the sea charts[1] of the archipelago and following a few undersea cables, I think it might be this cabin[2], which roughly matches with a map on GlobalConnects website[3]. Funnily enough, it's right next to a base of the Swedish military. [1]: https://geokatalog.sjofartsverket.se/kartvisarefyren/ https://geokatalog.sjofartsverket.se/kartvisarefyren/ [2]: https://maps.app.goo.gl/6mYHFhaUp7Jzx1X69 https://maps.app.goo.gl/6mYHFhaUp7Jzx1X69 [3]: https://globalconnectcarrier.com/our-network/ https://globalconnectcarrier.com/our-network/