Corfe Castle, located in Dorset, England, is a historic fortification dating back to the 11th century. Built by William the Conqueror, it stands on a hill in the Purbeck Hills and played a significant role in English history, including being besieged during the English Civil War. The castle's ruins are now owned by the National Trust and open to the public, attracting visitors who are intrigued by its rich past and stunning views of the surrounding countryside.