1963 ‘parking lot tree’ tyre tracks in a show covered car park. Via Kottke who later updated his post with another lovely example from Feltron:

Fits well with my love of this type of documentary. With the top image though I was keen to try and find the original source and so again referred to Tineye for reverse image search help. That led me to this Flashback page from 2014

Using Google reverse image search it’s possible to dig a little deeper. First the image seemed to surface around 2009. But the furthest back I can find it is on this 2004 ‘scanned and grabbed’ page (scroll down to the ‘parking lot’ link). 

Fittingly enough, that oook.info site is run by anthropologist Hugh Blackmer, and his blog looks great. What a successful hyperlink rabbit warren that turned out to be.