Thames Cruise Sightseeing River Red Rover Ticket. Take a friend or loved one aboard a City Cruises hop-on hop-off boat and enjoy the sights of London together, from the world-famous River Thames. Make your way through the heart of the city and discover its history around every bend. Your cruise will capture all of London’s best-loved landmarks as it passes by the grand St Paul’s Cathedral, The Tower of London, The Houses of Parliament and The London Eye plus many other historic and famous sites. Get Thames Cruise Sightseeing River Red Rover Ticket - £18.00.