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Matt Baker and Charlotte Smith head to the UK's longest and highest aqueduct, the Pontcysyllte Aqueduct in north Wales, and Joe Crowley investigates claims of threats to Britain's historic waterways.
Britain is home to over 4,000 castles. Charlotte Smith visits one of Wales's finest, Powis Castle, to explore the impressive grounds and grand rooms of this former medieval fortress.
As the RNLI celebrates its 200th anniversary, Matt Baker and Sammi Kinghorn meet some of its volunteers at the charity's station in Minehead, Somerset.