In the cave ‘Hyakujojiki no Dokutsu,’ upstream of the Tokushunbetsu River, magnificent ice stalagmites are continuously growing and reforming. Created by dripping water, it is a sight that will make you wonder about the mysterious workings of nature. There are study tours available for the overnight visitors of the Youth Hostel. To join the study tour contact Kitayuzawa Youth Hostel (0142-68-6552). Why not learn a little something while enjoying nature and its wonders?