Photo: Dguendel, CC BY 4.0 Free parks & gardens in Amsterdam
Photo: Dguendel, CC BY 4.0 
Photo: Trougnouf (Benoit Brummer), CC BY 4.0 Rijksmuseum Gardens
Free outside, paid inside
Photo: David van der Mark, CC BY-SA 2.0 Westerpark
Free, alwaysOosterpark
Free, always
Photo: Shirley de Jong, CC BY-SA 3.0 Amsterdamse Bos
Free, always
Photo: Błażej Pindor, CC BY-SA 3.0 Sarphatipark
Free, always
Photo: Ceescamel, CC BY-SA 4.0