A beautiful staple of old Icelandic architecture. Services are still held here, but you can always just take a look around the church.
Wikipedia https://pl.wikipedia.org/wiki/Kościół_w_Víðimýri
Official website http://www.northiceland.is/en/other/place/vidimyrarkirkja-church
Coordinates 65°32'19.674" N -19°28'13.383" E