This is a university town where the train station is a giant aviary. Very cool. OK, first, when the train stops, grab the mammoth doll. Take a right getting off the train (if your back is to the door). Now turn left and go all the way down to where you see the key. OK, you have to get the train there to wind it up. Head back into the station, out the front entrance and turn right. Go down the stairs and talk to the tugboat captain. He'll tow your train for $100.
Go back to the station entrance and straight out to the university. Go left and then right into the door to the library. "Natura Non Facit Saltus". On the left is a blue book saying that the red cookoo loves grapes. Upstairs up the ladder is a book on plants and mushrooms that says the Cola mushroom gives you great vision.
Go out and down the other end of the hallway to talk to Cornelius Pons. He says the station master knows about the grapes. Go back to the station, over the first bridge and head left. The station master is there, and a hook. Grab the hook. The station master denies knowing about the grapes. Follow him back to the first bridge. He says talk to Pons. Go back and talk to Pons. He says talk to the rectors. Go all the way down the other end of the hallway and talk to the rectors. They reveal that there's a garden behind the station with a grape garden that the stationmaster grows, Pons turns into wine and they drink. They also agree to give you $100 for fixing the bandstand.
Go back to the stationmaster, he opens the garden for you. It's straight back in the station along a curved path and through a door. Go to the very back of it and get the grapes from a bush there.