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Join an hour-long narrowboat trip exploring the waterways of East London with waterways group Thames21, and be inspired to enter its photography competition, 'Capturing London's Waterways'. Visit Thames21's website to take part in a series of events related to the competition, which complements the National Maritime Museum's exhibition 'Ansel Adams Photography: From the Mountains to the Sea'. Winning entries from the competition will go on display at the National Maritime Museum in April.