Did you know that up to 50% of Icelanders used to live in turf houses up until the late 19th century? The tradition dates back to the settlement in the 9th century and is believed to have been the product of challenging climate as the houses offer much better insulation compared to buildings only made from wood or stone. Besides, getting material like wood or stone in the 9th century was quite difficult. Turf, on the other hand, was everywhere and very durable.
The turf house tradition of Iceland was actually nominated for UNESCO World Heritage status back in 2011. There are quite a few turf houses you can visit while in Iceland, for example Glaumbær, Laufás, Grenjastaður, Keldur and many more.