Dorset is a county in southwest England. It’s known for the Jurassic Coast, a long stretch on the English Channel where the cliffs contain many fossils, and rock formations show millions of years of geological history. Two prominent natural landmarks are Durdle Door, an ancient stone arch, and the layered cliffs at nearby Lulworth Cove. The towns of Poole, Weymouth and Swanage are popular for their sandy beaches.