The Lower Falls of the Yellowstone River drops a stunning 308 feet (94 meters) to the canyon floor below—twice as big as Niagara Falls.

黄石河飞流直下大峡谷谷底，形成的“下黄石瀑布”落差高达308英尺（94米）——是尼亚加拉大瀑布的二倍。

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Northern Colorado's Big Thompson River flows from the Rocky Mountains (west) to the Great Plains (east) through a steep-walled, boulder-strewn canyon.

北科罗拉多州的大汤普森河，从落基山脉(西)经遍布卵石的陡峭峡谷流向大平原(东)。

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The Lancang River Big Canyon shows a variety of features.

澜沧河大峡谷表现出千差万别的形态。

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Jackson Hole Whitewater organises half day excursions on the class III Snake River with some big rapids through the limestone cliffs of Snake River Canyon.

BBC: The best of the West in Jackson Hole