Hokkaido natural monument of "Nakatonbetsu Limestone Cave" object particle beginning with, every season of animals and plants with can interact nature rich adjectival particle park.
Nakatonbetsu of nature object particle leisurely enjoy thing subject particle can do.
Nakatonbetsu Limestone Cave topic particle, approximately 10,000 years ago, north of sea in living was shellfish subject particle accumulated, limestone object particle formed thing is, this topic particle academic adverbial particle also valuable is and is, Japan northernmost of karst topography as has become.