First up, we have Norway’s stave churches. Most of these churches were built between 1150 and 1350. Not a single nail was used. There used to be over 1,000 stave churches in Norway alone.

"If you have time, you should visit the 800-year-old Borgund Stave Church in Lærdal, one of the most visited and photographed stave churches. Borgund Stave Church and its visitor centre are open ...