Koli National Park – Kolinuuron kierros Trail
Utgivare Metsähallitus, Vantaa, 2023
Sidantal 2 pp.
Travel back in time to Koli’s ancient history to find the rare Koli crystal, cyanite. If you can solve all the magic checkpoints along the 3.1 km route, you might find cyanite and its secrets hiding in the hills.