Long before the days of influencer marketing, SponsCon, and paid pap walks, billboards were one of the main ways to grab consumers' attention. Yet instead of approaching this marketing medium as a big cash grab, some decent Don Draper-types decided to embrace billboards as blank canvases, a fateful choice that left city streets resembling drive-by art galleries. 

From Anna Nicole Smith posing alongside one of her iconic Guess promos to The Beatles bringing Abbey Road to the streets of Los Angeles, here are 27 old-school billboards from the golden age of roadside advertising.