at Bettý's farm -- this version of Sæbólskirkja was consecrated in 1929 (the previous one blew away in a bad storm in 1924), but there has been a church in this location since at least 1200...
Bettý's daughter Kristín runs a guesthouse here, which has a history page with some fabulous old photos at the bottom:
www.litlabyli.com/valley-life
and a woman with a family connection to this remote valley has written up a bit of its history here:
guidetoiceland.is/connect-with-locals/regina/my-200th-blo... 