John Pfahl (1939–2020, United States) was an American photographer known for his conceptual landscape work that blends humor, intervention, and visual experimentation. He is associated with the New Topographics movement, though his work often departs from its strict neutrality.

Pfahl’s photographs frequently incorporate subtle manipulations or staged elements—such as string lines or visual disruptions—within natural or urban landscapes. These interventions challenge perception and question the relationship between reality and representation.

His series Altered Landscapes and Power Places are considered important contributions to late 20th-century photography. For collectors, Pfahl’s work is valued for its conceptual wit, formal clarity, and its distinctive position between documentary and constructed image-making.