The word ECHO rendered as massive brutalist typography constructed from cascading waterfalls and descending water droplets, each letter flowing with crystalline liquid motion, oversized bold text suspended within an endless aqueduct canyon, Swiss grid composition shattered by cascading water distortions, deep emerald green and misty white palette with rainbow light refractions from prismatic mist, volumetric water spray and rising mist clouds, experimental typography poster art, hyper-detailed 3D environment, dramatic upward perspective through towering waterfalls, serene meditative mood