

The caves in Cheddar Gorge inspired Tolkien's Glittering Caves of Aglarond, at the head of the gorge of Helm's Deep. Tolkien based Helm's Deep on England's Cheddar Gorge, and the Glittering Caves of Aglarond on the cave complex that he had visited there. Peter Jackson's 2002 film The Two Towers makes the battle dramatic, following Tolkien's account quite closely, but with changes to the forces involved: the defenders include a group of Elf-warriors sent by Elrond (intended in a preliminary treatment to also feature Aragorn's love-interest Arwen in leadership as an Elf-warrior princess, but this did not test well in early screenings) the attackers do not include men or wargs (battle-wolves), and the original theatrical release did not include the Huorns, either the Huorns, however, are included as additional scenes in the Extended Edition, later released on DVD. These attack, driving the Orcs into the angry Huorn forest, from which the Orcs never emerge the Huorns bury the Orcs's bodies in an earthen mound known as "Death's Down". On the side of the valley are relieving forces assembled by Gandalf and Erkenbrand, a Rohirrim leader.

They are surprised to see the valley to the enemy's rear blocked by a forest of tree-like Huorns that have walked from Fangorn in the night. The defenders hold out in the fortress until dawn, when Théoden and Aragorn lead a cavalry charge that drives the Orcs from the fortress. Saruman's Orcs breach the fortress wall that blocks the valley by setting off an explosion in a culvert Aragorn names it "Saruman's devilry" and "the fire of Orthanc" the critic Tom Shippey calls it "a kind of gunpowder". Although Théoden says that "the Hornburg has never fallen to assault," in the battle a massive army of Uruk-hai and Dunlendings sent by Saruman almost overwhelms the defences. Helm's Deep, with its fortress the Hornburg, becomes the refuge of some of the army of Rohan, the Rohirrim, under King Théoden, from assault by the forces of Saruman. Helm's Deep was a valley in the north-western White Mountains of Middle-earth. Helm's Deep is based on the Cheddar Gorge, a steep-sided limestone valley in the West of England, seen here in the 1890s
