In 1960, Long Beach entrepreneur Allen Parkinson (inventor of Sleep-Eze) had a clever idea to speed people across the international border at San Ysidro.  Partnering with Tijuana businessmen, Parkinson would build a mile-long aerial tramway to whisk passengers across the line in a Disneyland-style skyride.  Regrettably, the scheme fizzled, but not before San Diego architect Frank L. Hope  produced this fascinating rendering.

Special Collections, San Diego Public Library.