Hiking in forest wonderland

FIRST OF ALL; THANK YOU SO MUCH FOR YOUR CONGRATULATIONS, STARS AND HEARTS ON MY BLIPDAY. 

Today I explored the forest near Fredrikstad. In this area people in the Stone Age lived in some caves (extra)  that I haven't visit before.  The entrances to the caves are very narrow, and there are no natural light. 

It gave me many thoughts about life in those old times!