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A riverboat is a type of watercraft designed to navigate rivers and other inland waterways. Typically propelled by paddlewheels or propellers, riverboats have a flat bottom to allow for easy navigation in shallow waters. These vessels have been used for transportation, recreation, and commerce, and are often associated with a sense of nostalgia and leisurely travel along scenic river routes. Riverboats may vary in size and design, from small, traditional paddlewheel boats to larger, modern cruise ships with luxurious amenities.