lave |
2012-12-12 22:31 |
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是一处举世闻名的自然奇观,位于美国西部亚利桑那州西北部的凯巴布高原上,大峡谷全长446公里,平均宽度16公里,最大深度1740米,平均谷深1600米,总面积2724平方公里。由于科罗拉多河穿流其中,故又名科罗拉多大峡谷,它是联合国教科文组织选为受保护的天然遗产之一 |
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