Envision a towering, monolithic brutalist structure that looms ominously under a stormy, overcast sky. The harsh concrete walls and stark geometric forms are massive and imposing, with minimal windows and sharp angular lines. The scene should evoke a sense of dread and isolation—emphasizing the cold, formidable nature of brutalism. Use dark, moody lighting to enhance the eerie and unsettling atmosphere, as though the structure itself is a silent, watchful presence in a barren, post-apocalyptic landscape