Family fountain

This fountain is placed in one of the parks of Copenhagen. I've been here many times in my life, and when I was yonger, my family used to bring me here on my birthday. Many many years ago my great-grandfather worked on this fountain. I've heard the story so many times when I was younger, but still I don't remember exactly what it was he made. I obviously didn't pay too much attention then... I think I have to ask my mom again...