A swinging London fashion photographer (David Hemmings) believes he may have inadvertently photographed a murder while shooting in a park—but the more he enlarges his images, the less certain he becomes of what he has witnessed. Michelangelo Antonioni's Blow-Up is a dazzling puzzle film, as much an essay on the nature of perception and photographic truth as it is a thriller. Saturated with the colors, sounds, and cultural energy of 1960s London—featuring a cameo from the Yardbirds—it remains one of cinema's great explorations of the limits of seeing.