To 27 ports; the busiest crossings are to Greenwich (57 minutes, 65 times a day), Tower of London (32 minutes, 52 times a day), London Eye (5 minutes, 47 times a day), Embankment (10 minutes, 42 times a day), Bankside (22 minutes, 42 times a day), London Bridge (28 minutes, 42 times a day), Canary Wharf (44 minutes, 42 times a day) and North Greenwich (1 hour 5 minutes, 42 times a day).