River Pass Adults £9, Children £4.50 The River Pass is a fantastic way to see London from a different view.... the Thames! The Catamaran Cruisers sail up the Thames between Embankment and Greenwich. You have the flexibility to stay on board for the duration of the trip or to just hop on and off at the various stops. The advantage being that you pay for a whole day of transport rather than having to pay a separate fare every time you alight. Tours leave Embankment every 40 mins from 10am with a final catamaran leaving at 4.20pm. Return cruisers from Greenwich start at 11.15am and the last one leaves at 5.35pm.