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.

Tucked away in the scenic fjords of Norway, the Hopperstad Stave Church is a remarkable survivor of the Viking Age. Rick Steves highly recommends a visit here as part of a Norway trip. It was ...