In this Aug. 1, 2018 photo, tourists climb a temple at the archeological site of Coba, in Mexico's Yucatan Peninsula. Mexico's president-elect Andres Manuel Lopez Obrador wants to build a train that would run from Yucatan Peninsula resort of Cancun to the Mayan ruins of Palenque in Chiapas, a route dotted by low jungle, wildlife reserves, pre-Hispanic archaeological sites, wetlands and underground rivers that can suddenly cave in. (AP Photo/Eduardo Verdugo)
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