Charred tree trunks support sauna on Finnish island by Jaakko Torvinen

A colonnade of whole charred tree trunks supports the roof of Puusauna, a sauna and tea room in Finland designed by architect Jaakko Torvinen.

Located on the small island of Kaunissaari in the Gulf of Finland, the 30-square-metre sauna sits at the boundary where a large forest meets the beach.

Charred tree trunks support this Finnish sauna

Puusauna, which means Tree Sauna in English, was constructed almost entirely using trees from this neighbouring forest, which have been hand-hewn...