Farmers and their dog are seen on a "trajinera" -traditional flat-bottomed river boat- at Xochimilco natural reserve in Mexico City, on August 21, 2015. Located south of the agglomerated Mexico City, the "chinampas" -artificial islands created by the Toltec culture 1,000 years ago for agricultural purposes- of Xochimilco, are home to hundreds of people who use "trajineras" as transport.  AFP PHOTO/RONALDO SCHEMIDT        (Photo credit should read RONALDO SCHEMIDT/AFP via Getty Images)