On 20 October 1967 Roger Patterson and Bob Gimlin shot fifty-nine seconds of film here, showing a large hairy figure walking across a gravel bar and glancing back over its shoulder. That frame is the most recognised image of Bigfoot ever made, and the argument over it has not settled in half a century: some analyse the gait as impossible for a person, others look for the seams of a suit. The place itself is an ordinary creek in the remote forests of northern California, and people still come with cameras.