Dohodno sdanie ("Income building") - a beautiful early XXc buildimg in the centre
The centre - many old buildings there
The Sexaginta Prista ancient Roman military camp. The place is small andnot much left, butthe museumguide is very knowledheable
The park around the Pantheon - some nice old tombs there as it used to be agraveyard and sometombs were preserved.
Outside the city - Ivanovo rock hewnchurches which is a UNESCO site
S.Dimitar Basarbovski rock hewn monastery
Ivanovo rock churches - nearby Ivanovo village
Cherven fortress -nearby thevillage Cherven
The monastery is earby Basarbovo village.
All three are reachable by car, either use GPS or get a map of Bulgaria when in Ruse.
When close to the sites, there should be brown signs (for historical sites) n the roads for each of the three.
When in Ruse, you don't need a car, everything is within walking distance. During the week parking in the centre is paid.