Callejón de Huaylas, Ancash, Peru UFO
Captured during a mountain expedition at an altitude of 10,000ft (3050m) above sea level in the Huaylas Valley near Yungay, Peru, these photographs by Augusto Arrando remain a mystery. Despite diligent efforts, J. Richard Greenwell could not meet Arrando in person. The hope of verifying these images was lost when a colossal avalanche in May 1970 buried Yungay and its 20,000 inhabitants.