In this July 13, 2017, a farmer moves his harvest of squash flowers through the channels of Xochimilco in Mexico City. Xochimilco is designated by UNESCO as a World Heritage site. (AP Photo / Marco Ugarte)
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In this July 13, 2017, a farmer moves his harvest of squash flowers through the channels of Xochimilco in Mexico City. Xochimilco is designated by UNESCO as a World Heritage site. (AP Photo / Marco Ugarte)
