When we got back to Linz, we drove past Hauptplatz the main city square. It was so beautiful that we decided to have a little exploration on our own. After changing our Bistro reservation to 8 pm, we started to walk to the Main Square from the ship. Then we saw the cute yellow trolley so we decided to take a little tour of the town. It was only €9 per person for a 30-minute tour. We were the red tour so we could see our ship from the bridge.
After the trolley trip, we walked around and then paid €1, 20 to take a 3-stop bus ride back to the Main Square before walking back to the ship. We just paid for the bus tickets from the machine at the bus stop, very easy with clear English instructions.