This is a great idea: A ship, built in 1935, turned into a hostel, which opened in the fall of 2013. Docked on the seafront in the centre of Rijeka, the ship’s 35 cabins are now single, double, triple, and quadruple rooms, joined by several dorms. The berths are quite small, with low ceilings, but they have good air-conditioning and en suite showers, plus portholes for windows. The staff is friendly and welcoming, and there’s a bar on the top deck.