Making its way through the heart of London, the Thames is one of the most famous rivers in the world- and the London river cruise is one of the best ways to explore the beautiful river. Idling along the length of the Thames, the cruise offers fantastic, unobstructed views of London's biggest and proudest buildings. Cruising past, one catches a glimpse of the London Eye in its slow rotation, of the Big Ben sounding the hour, of the glass facade of the odd-shaped Gherkin.