Nicopolis ad Istrum | ruined castle (en), Roman Empire (en), open air museum (en), interesting place (en), 100 Tourist Sites of Bulgaria (en), historic ruins (en), tourist attraction (en), 2nd century construction (en)

Bulgaria / Veliko Tarnovo / Gorna Orjahovica /

ruined castle (en), Roman Empire (en), open air museum (en), interesting place (en), 100 Tourist Sites of Bulgaria (en), historic ruins (en), tourist attraction (en), 2nd century construction (en)