Time Out says
Rijeka’s main street, parallel to the sea and the Riva, has been in the heart of things ever since it was the Corso, showcase thoroughfare of Fiume. Terrace cafés and shops line this pedestrianised stretch, where the Rijeka Carnival unfolds in all its February finery. In terms of actual sights, there’s the Clock Tower and nearby, the Radio Rijeka building, more of a curiosity. All the other main museums are a short walk away.