Enjoy the sights on a river cruiser along the thames board a city cruiser and head down the river to greenwich the cruise gives a real insight into the layers of history that have built up along the river with great views of the houses of parliament tate modern st pauls and many more london landmarks anytime you want hop off the boat at any one of four piers go and explore and hop back on later tickets to the tower of london the magnificent medieval fortress on the north bank of the