In a rare trip to the Americas, this past weekend brought Pope Francis here to Philadelphia after stops in Washington and New York. Philadelphia has been criticized for the rollout of its plan to fence off and restrict access to a massive section of the city center, but those temporary security measures resulted in some once in a lifetime photos thanks to the no-vehicle policy. For the first (and likely last) time ever, visitors and residents alike were given a glimpse of the city as a haven for pedestrians and cyclists. I couldn't pass up the opportunity to see it for myself, so I grabbed my bike and spent about four hours breathing in the air of a seemingly empty city.