That thundering crash is the tens of thousands of cubic feet of water that flow each second over Niagara Falls which includes the American Falls and Horseshoe Falls.

• 尼加拉瓜瀑布由美国瀑布和马蹄瀑布组成，每秒中数以万计立方米的水量发出雷霆万钧般的撞击声。