Photo: European Commission, CC BY 4.0 Free walks & trails in Copenhagen
Photo: European Commission, CC BY 4.0 
Photo: CucombreLibre from New York, NY, USA, CC BY 2.0 Kastellet
Free, always
Photo: Thomas Rousing from Copenhagen, Denmark, CC BY 2.0 Christianshavn
Free, always
Photo: Olga Itenberg, CC BY 2.0 Strøget
Free, always
Photo: Jesper Hertel, CC BY-SA 3.0 Nyboder
Free, always
Photo: Franklin Heijnen, CC BY-SA 2.0 Freetown Christiania
Free, always
Photo: it's a foot!, CC BY-SA 2.0