Alan Titchmarsh in front of British castle

The National Trust opens its doors for the first time, as part of this celebratory new series, exploring stunning estates, historic houses and miles of breath-taking landscapes and coastlines. Highlighting the conservation work of the National Trust and showcasing their spectacular buildings and gardens from across the UK, Alan and a host of experts and enthusiasts discover inspiring restoration work, uncover hidden rooms, long-lost walled herb gardens and surprising wildlife.