Aholanvaaran hiidenkirnut

A group of giant's kettles (glacial potholes) on Kalliovaara hill. A pothole called Juomapata is the biggest one in Finland and one of the largest in the world. The 6.8-km nature trail has steep, rough and possibly slippery sections; it is not suitable for the mobility impaired. Using wellies or hiking shoes is heavily recommended. There are two shelters by the trail, one across the bridge, one by the Impivaara hill.

• outdoors

Getting there

across Oulankajoki from the village Aholanvaara; at Hautajärvi on the Oulangantie road towards Kuusamo, turn west towards Aholanvaara and Hirvasvaara; turn left after 20 km, 2.3 km after Hirvasvaara, and drive 3.8 km more along a forest road; the nature trail starts at your left just before the bridge, which might not suite heavy cars; otherwise you can continue 1 km, turn left and drive 2 km more, to just 1.5 km from the potholes