Photo: Mohan Krishnan (en:User talk:Nsmohan, CC BY-SA 3.0 Free historic sites in Chennai
Photo: Mohan Krishnan (en:User talk:Nsmohan, CC BY-SA 3.0 
Photo: w:user:PlaneMad, CC BY-SA 2.5 San Thome Basilica
Free, always
Photo: Mohan Krishnan (talk), CC BY-SA 3.0 Parthasarathy Temple
Free, always
Photo: L.vivian.richard at English Wikipedia, Public domain Fort St. George
Free outside, paid inside
Photo: Ashok Arunagiri, CC BY-SA 4.0 Mylapore
Free, always
Photo: Sankar Pandian, CC BY 2.0 Besant Nagar
Free, always
Photo: Saiphani02, CC BY-SA 4.0 Ripon Building
Free outside, paid inside
Photo: jamal haider from india, CC BY-SA 2.0 Chennai Central
Free outside, paid inside
Photo: Aleksandr Zykov from Russia, CC BY-SA 2.0 Thousand Lights Mosque
Free, always
Photo: Simply CVR, CC BY 2.0 Vadapalani Murugan Temple
Free, always
Photo: Simply CVR, CC BY 2.0