Tree Mountain is an artificial mountain near Ylöjärvi in Finland. Over a period of 4 years 11,000 people planted 11,000 trees in a specifically designed mathematical pattern based on the golden section.
— Fermat's Library (@fermatslibrary) January 17, 2020
The project was conceived by the artist Agnes Denes in 1984. pic.twitter.com/7dNYKhrk0y