Along the trail to the waterfall was a small sugar mill.  It was quite interesting: the top level had a pair of oxen working a grinder, and the farmers fed in sugarcane.  The liquid came out on a lower level where the señora scooped it into boiling cauldrons to purify.  Finally, the sugarcane was poured into small containers to harden and transport.  We got to taste it at each stage.  Yummy!