The couple, who hail from the San Francisco area, left in November and began a series of social media posts chronicling the trip of their dreams -- a four-month bike adventure through South America.

CNN: STORY HIGHLIGHTS

The couple, who hail from the San Francisco area, left last November and began a series of social media posts chronicling the trip of their dreams -- a four-month bike adventure through South America.

CNN: STORY HIGHLIGHTS

But Mount Rushmore sculptor Gutzon Borglum had big dreams, and they included a mountainside series of granite tableaus that would retell significant events in American history.

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The back story to every success story in art, science, business or true love is a long series of rejections, and the single biggest reason why we never live our dreams is the fear of failure which is just another term for fear of rejection.

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