Lusto is the Finnish word for an annual growth ring, and the museum lives up to it: this is a place that takes the country's relationship with its forests seriously, from Stone Age tar-burners to modern paper mills. The permanent exhibition runs through the practical, technical, and cultural side of forestry — old logging tools, a sauna built into the gallery, a wall of tree species, photographs of the men who floated logs down the rivers — and rotating exhibitions cover everything from forest art to indigenous Sami land use.
It sounds drier than it is. The building itself is interesting — a striking 1994 wooden structure by Rainer Mahlamäki — and the displays are well lit and well labelled in English. There is a café and a shop selling reasonable books on Finnish nature. Allow two hours; longer if you want to walk the small outdoor exhibits of historic forest machinery.