Avenue of mature Lime trees leading to Calke Abbey, The National Forest, Derbyshire, UK, November 2010. Photographer quote: "Autumn is such a great time of year and the National Forest initiative is just an inspiring project. Here, an avenue of lime trees leading into the distance create an almost ethereal atmosphere." Did you know? Woodland cover has increased from 6% to 18% since the inception of The National Forest in the English Midlands.