If you ever find yourself in the mountains of Guerrero during a village festival, don’t be alarmed if you see a man in a jaguar mask leaping at another dressed as a farmer swinging a whip. You haven’t stumbled into a surreal jungle nightmare — you’ve entered the world of the Tlacololeros.

Imagine a place where the Earth hisses, belches sulfur, and constantly exhales white plumes of steam into the sky. A place where black eggs are boiled in volcanic springs and eaten to gain extra years of life. Welcome to Owakudani—one of Japan’s most unusual and naturally hostile locations, and one that feels like it sits right at the edge of the spirit world.