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Cutty Sark is the last great tea clipper you can step aboard, launched in 1869 for speed. Walk her decks, then stand beneath the suspended, Muntz-metal hull to admire those knife-sharp lines. Displays trace tea races with Thermopylae in 1871 and later record wool passages from Australia in the 1880s. Fire damage in 2007 led to a careful 2012 reopening, so conservation is part of the story. It's compact, hands-on, and brilliant with children. Book ahead at weekends, arrive early, and allow 60-90 minutes. Pair your visit with the National Maritime Museum or the Royal Observatory for a full Greenwich day anchored in Britain's seafaring past.