The main attraction of the city is the Romanesque bridge of the 12th century. The tall tower in the middle of the bridge is the gate where the guards charged the fare.
We spent the night in this town and can recommend a Els Jardins De La Martana hotel (booking.com). It is located in an old house, right next to the bridge. On the next photo the hotel is on the right.
Getting there: free parking N 42 11.938 E 2 42.195. By bus from Barcelona, Girona or other cities, check schedule here http://www.teisa-bus.com.