A photorealistic street art mural of a massive ancient hourglass with flowing golden sand and ornate bronze frames erupting through the crumbling stone wall of an abandoned 19th-century clock tower, its intricate glass and sand texture rendered in hyperrealistic spray paint with dust and weathering textures, soft amber moonlight streaming through broken clock faces casting ethereal beams across scattered vintage timepieces and toppled gears, mood melancholic and reflective yet mesmerizing, composition dramatic with hourglass mid-flip filling the tower space, broken pendulum mechanisms and fallen clock hands creating temporal decay, color palette aged bronze and warm sand gold contrasted with weathered stone grays and cool moonlight silver glow