Photo: Manster323, CC0 Free landmarks in Helsinki
Photo: Manster323, CC0 
Photo: Bahnfrend, CC BY-SA 4.0 Senate Square
Free, always
Photo: Vadelmavene, CC BY-SA 4.0 Kamppi Chapel of Silence
Free, always
Photo: Cope Baronet, CC BY-SA 4.0 Oodi Central Library
Free, alwaysSibelius Monument
Free, always
Photo: SebastianJFromTheBurg, CC BY-SA 4.0 Helsinki Central Station
Free outside, paid inside
Photo: User:Matthias Süßen, CC BY-SA 3.0