You may spot Rostov-on-Don Cathedral from a distance before you actually find this amazing religious building. Step inside if it's open or just take in the facade from the street.
A trip to this principal church won't cost a thing, which is just what you want if you're after free things to do. You'll find Rostov-on-Don Cathedral in Leninskiy rayon. There are loads more attractions to discover close by, including Olimp - 2, Gorky Park and Don State Technical University.