"Avontuur" is a barge built in 1913 and located very centrally in Rotterdam to the Maritiem Museum, Markthall, Cube Houses, Oude Haven etc. It is a quaint, quirky location, suitable only for agile and reasonably fit people. Do not bring a large suitcase with wheels - it would not go down the gangway or along the narrow sides of the barge, or down the very steep ladder into the living area. Premala was a very welcoming host, rooms were tidy, well stocked with everything you need - kettle, teas, heater, hair dryer etc. Note the mattresses are right on the floor, but super comfy. He sent clear instructions and good tips for things to do and see.