A massive, decaying brutalist megastructure, looming like a fortress of despair, its jagged, asymmetrical forms twisting unnaturally under a dim, blood-red sky. The architecture oozes dread, with spiked protrusions, cavernous voids, and narrow, maze-like corridors barely illuminated by flickering, cold, artificial lights. The structure appears alive, with human-machine hybrids fused grotesquely into its walls, their blank, mechanical eyes emitting faint glows as they twitch rhythmically, lifelessly. Surrounding the structure is a barren wasteland of cracked earth and pools of dark, reflective liquid, dotted with skeletal remains of technology long abandoned. A toxic mist hangs in the air, shrouding distant monoliths that hint at further horrors, while the faint echoes of metallic groans and distorted whispers create a sense of unease. The scene is a chilling embodiment of terror, where humanity has been consumed by its creations.