“Echolocation” is centred around the complex acoustic relationships in the inner part of the Large Water Reservoir’s concentric ring architecture. Subwoofers give the architecture variable tonal colourations in the individual rings that are counterpointed by rotating high range notes. Accompanied only by selected light sources, the visitors use special detectors that recapture the functional principles of an echo-sounder that help them navigate through the darkened labyrinth. Acoustic signals that are reflected from the surrounding architecture shed light on the individual location and consolidate into a constantly changing sound space.