Photo: Tony Hisgett from Birmingham, UK, CC BY 2.0 Free historic sites in Cardiff
Photo: Tony Hisgett from Birmingham, UK, CC BY 2.0 
Photo: Dominic Nelson, CC BY-SA 4.0 Cardiff Market
Free, always
Photo: grahamwell / Graham profile at Flickr website, CC BY-SA 2.0 Victorian arcades
Free, always
Photo: Bill Boaden, CC BY-SA 2.0 Llandaff Cathedral
Free, alwaysAnimal Wall
Free, alwaysCathays Park
Free, alwaysTemple of Peace
Free outside, paid inside
Photo: Nick Russill from Cardiff, UK, CC BY 2.0 Norwegian Church
Free, always
Photo: Alice Turner, CC BY-SA 4.0