The sundbåt is Kristiansund's small harbour ferry, connecting the islands of the town centre across the inner waterway. It has been running since 1876 and remains a working mode of transport for locals, not a tourist attraction — which makes it more interesting. The crossing takes only a few minutes but gives a different perspective on the town's island geography, with the functionalist church, the old Innlandet warehouses, and the modern harbour all visible at once from the water.
A single ticket costs around 35 NOK (2024); a day pass or multi-trip card makes sense if you are moving between islands repeatedly. The boats run frequently through the day. Take it at least once — the best short boat ride in any Norwegian city short of Bergen's ferry network.