The Descent is a 2005 British horror film written and directed by Neil Marshall. The film follows six women who, having entered an unmapped cave system, become trapped and are hunted by troglofaunal flesh-eating humanoids.Filming took place in the United Kingdom. Exterior scenes were filmed at Ashridge Park, Buckinghamshire. Because the filmmakers considered it too dangerous and time-consuming to shoot in an actual cave, interior scenes were filmed on sets built at Pinewood Studios near London.