When we in Iceland we drove the length of the country, in the 4x4, over dirt roads of the interior, just to see the Textile Museum. It was well worth it.
The lava rocks are sharp to drive on, let alone walk on.
The textile museum had a wonderful collection of the common fish skin shoes with knitted insoles. As you can imagine a cured fish skin shoe does not last long, and a journey was measured by the number of pairs of shoes you would need to get from A to B.
When the skin wore through, you would remove your knitted sole, knitted on about 2mm needles, and insert it in the next pair of shoes. Wow.