A strong echo returns when you shout from the rim of the Grand Canyon because of the natural acoustics of the canyon walls. The steep and expansive walls of the Grand Canyon act as a natural sound reflector, bouncing the sound waves back towards the source with minimal interference. This creates a strong and distinct echo that can travel long distances. Additionally, the lack of vegetation and other obstructions in the canyon allow sound waves to travel more freely, further enhancing the echoing effect.
