abandoned facility, Site 21, rusty metal textures, overgrown vegetation, crumbling concrete structures, eerie atmosphere, dim lighting, long shadows, broken windows, graffiti walls, scattered debris, industrial pipes, dystopian vibe, wide-angle shot, desolate landscape, post-apocalyptic setting, steel beams, chain-link fences, moss-covered surfaces, puddles reflecting light, distant mountains, cloudy sky, sunset glow, silhouette of a lone figure, exploration theme, sci-fi elements, dynamic composition, HDR effect, cinematic tone.