Cruises along the Manchester Ship Canal are more popular than ever, with a rise in passenger numbers of more than 20% in the past year.
The six-hour journey includes a full commentary
The cruise ships make six-hour trips between Liverpool's Pier Head and Salford Quays, providing commentary on the history of the 35-mile waterway.
Operator Mersey Ferries said more than 15,200 passengers had taken the £32 cruises so far in 2006.
The firm said it plans to provide more cruises in the future.
Cllr Mark Dowd, Chair of Merseytravel, said: "The cruises are one of the jewels in the Mersey Ferries' crown and to reach 15,000 passengers is a major milestone.
"The demand we've had for the cruises this year has been excellent and it just keeps growing."
The Mersey Ferries have had multi-million pound refits and are equipped with a bar and food area.