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In the heart of the Selva Maya rainforest, it’s a race against time. Cave diver Jose Urbina Bravo and his fellow activists are striving to stop the construction of Mexico's largest-ever infrastructure project: the Maya Train. They embark on a series of expeditions to survey its impact on wildlife and the environment, above and below ground. Amid an audacious legal challenge to halt development, the group continues exploring the region's intricate underground cave system, desperate to document what will be lost.
