Woodchester Mansion is an unfinished, Gothic revival mansion house in Nympsfield, Gloucestershire, England. It is on the site of an earlier house known as Spring Park. The mansion is a Grade I listed building. The mansion was abandoned by its builders in the middle of construction, leaving behind a building that appears complete from the outside, but with floors, plaster and whole rooms missing inside. It has remained in this state since the mid-1870s.