Broken Circle/Spiral Hill is the only ‘earthwork’ produced by Smithson still in existence outside the United States. As an integral part of these works, Smithson made films that reveal the spatial and environmental context of the work. Aerial shots in a symmetrical pattern were combined with close-ups, documentary footage of the construction of the work and views of the surrounding landscape. In this way, visitors to galleries and museums were introduced to the earthworks produced by Smithson in barely accessible, remote locations. As a result of a tragic aircraft accident during a reconnaissance flight in 1973, Smithson’s life and work came to a premature end. Smithson was never able to finish the film about Broken Circle/Spiral Hill.