Hostel Pletkovic hostel is very close to the city harbour, train and bus station as well as the pick up point for the airport.
Once you get off the train/ ferry/ bus, follow the main road going upwards towards the traffic light. When you cross the road at this traffic light you will see a city bus station, and behind it Karlovacka bank. On the left side of the bank there is a small alley where it is located.