Every spring, as the night wraps Toyama Bay in a blanket of stars, another constellation appears just below the surface of the sea. Glowing blue, pulsing softly, the firefly squid—known in Japan as Hotaru Ika—emerges from the depths in a dazzling marine light show that defies logic and feels like magic.

Picture this: rows upon rows of human skulls stacked neatly on wooden racks, bleached by the sun, staring out into the sacred courtyards of ancient Tenochtitlan. This isn’t a scene from a horror movie — it’s history. Meet the Tzompantli, one of the most chilling and misunderstood relics of Aztec civilization.