River thames sightseeing cruise this ticket entitles you to a hop on hop off ticket from the following piers waterloo westminster tower pier and greenwich the ticket is valid for unlimited travel throughout the day embarking or landing at any of the piers an stunning way of seeing all of the major london sights from the river the tower of london thetower of londonhas been an integral part of british royal history for nearly 1 000 years and is classified as a world heritage site on