2009 Michelob Ultra Lighthouse Cycling Tour of Puerto Rico / DSC00049 Photos by Chris Kostman / AdventureCORPS: Exploring Old San Juan: Feb 4, 2009 This ramp was used to winch the cannons up and down. The flat spots in the staircase on each side, every few steps, were for the soldiers to use for resting as they were doing that brutally hard job.