President Andrés Manuel López Obrador did not seem to be joking when he posted the photo of an “Aluxe,” a mischievous woodland spirit in Mayan folklore. López Obrador wrote the photo “was taken three days ago by an engineer, it appears to be an aluxe,” adding “everything is mystical.” The nighttime photo shows a tree with a branch forming what looks like a halo of hair, and what may be stars forming the figure’s eyes. López Obrador has long expressed reverence for indigenous cultures and beliefs. Engineers and workers are in the Yucatan peninsula, constructing a tourist train that is...