Seamus Heaney's attention to the landscape has obscured his interest in riverbanks, lough shores and coastlines. Images of water and liquidity are critical to his writing, as are narratives of the sea and its crossings. This chapter traces Heaney's fluid aesthetic throughout his career, with particular attention to his declension of water in all its forms as evolving metaphors for mortality. Reading a series of texts across the breadth of Heaney's career, it engages his work with critical conversations in archipelagic literature.