美国科罗拉多大峡谷,将建距离谷底约1208米的悬空走廊,其高度是目前世界上最高摩天大楼的两倍多。据悉,这个高度动物目前只有飞鸟能至,由此高度坠落,大概要足足15秒才会落地。悬空走廊呈马蹄型,宽约3米,最远距谷壁边沿约21米,超过半个足球场的 The United States Colorado Grand Canyon, will be built about 1208 meters away from the bottom of the corridor, its height is the world’s tallest skyscraper more than twice. It is reported that this high level of animals is only able to fly, thus a high degree of fall, probably to a full 15 seconds to fall. Dangling corridor is horseshoe-shaped, about 3 meters wide, the most distant valley wall edge of about 21 meters, more than half of the football field