Across Lake Pielinen from Lieksa, the ridges of Koli rise out of dense spruce forest — three rocky summits, the highest at 347 metres, that make up Finland's most painted landscape. The view east over the lake to the forests of Lieksa is the postcard image of Finnish nature.
Reach Koli from Lieksa by the summer ferry across the lake or by car around the south end via Joensuu (90 minutes). The national park has marked trails on the summits and a cable car for those who would rather not climb. Best in autumn when the birches turn yellow against the dark spruces — the colour Järnefelt painted.