Rondvaartbedrijf Kool is the oldest canal boat company in town and has been ferrying tourists and locals around for over 45 years. The one-hour round trip through the canal system that surrounds the city is an absolute must-see in Groningen. The well-maintained boats are completely covered and have a heating system for the winter months, but the roof panels and the side windows are opened during the summer. The boats have artistic Dutch names like Pronkjewail, Golden Raand, Ommelaand and the Wonderlaand.