John Balsdon photographs the extraordinary patterns and shapes of the world’s terrain as seen from the air. In this episode, he talks about the challenges and highlights of a recent 20,000 km expedition achieved in record time, his travels around the world in a previous career as a lawyer, the physicality required for aerial photography, his artistic influences, his self-imposed rules for his practice, examples of his work that illustrate the wonders of natural topography, and the technicalities involved in photographing them.