The construction of the Maya Train has reportedly affected at least 122 caves in the region, according to activists. Guillermo D’Christy, a hydrologist and member of the "Sélvame del Tren" collective, has been vocal about the drilling of underground caves due to the construction works.

D’Christy recently shared that machinery and stones are now visible in the Boox Balam cave, a site that was still diveable just a year ago. This is not the first time he has raised concerns about the impact of the Maya Train project on the local cave systems.

The government had previously committed to preserving the area's cave system, promising not to cause any damage. "We were supposed to protect this system of caves and cenotes, and the promise was that they would not be touched," D’Christy stated.

However, he insists that the caves are being drilled and filled with concrete. "We already have at least 12 large drillings… Mass tourism, large-scale real estate developments, and running a train through the jungle is the worst ecological destruction that has been committed in this place," he argued.

The construction has already caused significant issues in the region, including the pollution of underground rivers. Furthermore, the pipes used in the construction lack a protective lining, leading to steel contamination of water resources, as pointed out by President Andrés Manuel López Obrador.

It's also worth noting that the continuation of these works allegedly violates a judicial suspension issued at the end of January, which ordered a halt to all work on section 5 of the project.