A stave church is a medieval wooden Christian church building style once common in northwestern Europe, Now after our fascination of going up into the clouds they are not a common sight anymore. In Norway there are 28 extant stave churches still standing today and this particular one in Borgund features a triple nave and is said to be the best preserved of them all, I would love to see it by my own eyes one day.
Built some time between 1180 and 1250 AD, Borgund is now used as a museum and is run by the Society for the Preservation of Ancient Norwegian Monuments. Its walls are formed by vertical wooden boards, or staves, hence the name “stave church”. [source]
On the gables of the roof, there are four carved dragon heads, swooping from the carved roof ridge crests, recalling the carved dragon heads found on the prows of Norse ships. [Source]
Almost every remaining stave church can be found in Norway. Outside of the country there is one in Hedared, Sweden; but it is much newer, built around the 1500s. There is also a relocated Norwegian Stave Church in Karpacz, Poland (via Krummhübel, Germany).