The Devil's Den or Devil's Den is a dolmen burial chamber on Fyfield Hill near Marlborough, Wiltshire, England. The chamber is part of a neolithic passage grave on Fyfield Down. Two standing stones, a capstone and two fallen stones are all that remain of what was the entrance to a long mound, described in the 1920s as being around 230 ft long. The capstone is believed to weigh 17 tons. The burial chamber was reconstructed in 1921.
Reconstructed using frames from a youtube video in Agisoft Metashape in August 2020 - https://www.youtube.com/watch?v=61h497PvKdI