To 22 ports; the busiest crossings are to Westminster (13 minutes, 51 times a day in season), London Bridge (5 minutes, 43 times a day), Tower of London (9 minutes, 43 times a day), Canary Wharf (20 minutes, 43 times a day), Greenwich (33 minutes, 43 times a day), North Greenwich (43 minutes, 43 times a day), Embankment (12 minutes, 42 times a day) and Battersea Power Station (31 minutes, 42 times a day).