Jan Kaňák's excursion in the Sofronka Arboretum in 2023 (his curly-haired son Jan is standing behind him on the left)

Jan Kaňák with his father Karel Kaňák and daughter Kateřina in 1998

Jan Kaňák with his mother Jarmila and daughter Kateřina in 2006

Jan Kaňák with his daughter Kateřina and her mother Lucie in 1997

Jan Kaňák with daughter Kateřina and son Jan in 2006

Mom Jarmila Kaňáková, née Bastlová

Jan Kaňák with his daughter Kateřina in 1997

Brothers Jan and Karel Kaňák in 2020

Son Jan Kaňák in 2020

Great-grandfather of Karel Kaňák's father, professional piper Hynek Kaňák, on a cut-out of the J. K. Tyl Theatre curtain by Augustin Němejc from 1902

A view of Rozkopany Pond, probably from 1968, which is part of Sofronka and where his father Karel Kaňák brought swans (they were not present in local Bolevec ponds before)

Unknown girl around 1965 at the weather station in the Sofronka Arboretum, which included the original louvered weather box

Great-grandfather of Karel Kaňák's father, professional piper Hynek Kaňák, in Augustin Němejc's painting from 1902

Tree nursery in Sofronka around 1959 (Jan Kaňák's father, Karel Kaňák, used to sleep in the white box on the left)

Jan Kaňák extracting cone seeds for germination in the laboratory of the Sofronka Arboretum in 1981

An older aerial view of Sofronka by a man who fled abroad during the communist regime

Dad Karel Kaňák (right) during an excursion in the Sofronka Arboretum probably in 1994

Karel and Jan Kaňák at the seminar marking the 35th anniversary of the establishment of the VÚLHM research facility at Sofronka.

Jan Kaňák and others at the ceremonial opening of the educational trail about pine trees in 2010.

Karel Kaňák, father of Jan Kaňák and founder of the Sofronka Arboretum, in 1970

Malcolm Anthony Nobs and father Karel Kaňák in the Sofronka Arboretum in 1966

Tree nursery in Šofronka 1998

Forest nursery in Sofronka probably in 1964

Jan Kaňák in 2023

Mirko Vanecek in 2020