A woman rides an urban zipline above Justin Herman Plaza with the Ferry Building in the background in San Francisco, Monday, July 11, 2011. The zipline, run by Ziptrek Ecotours, costs $29 per person ... more 
A woman rides an urban zipline above Justin Herman Plaza with the Ferry Building in the background in San Francisco, Monday, July 11, 2011. The zipline, run by Ziptrek Ecotours, costs $29 per person and travels 750 feet at a height of 70 feet. The rides will last through the end of August at the plaza by the Embarcadero. (AP Photo/Eric Risberg) less 
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Associated Press | Photo By Eric Risberg
Mon, Jul 11, 2011 6:49 PM EDT