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30 shackles is about nine-tenths as tall as Olo'upena Falls.
In other words, it's 0.91430 times the height of Olo'upena Falls, and the height of Olo'upena Falls is 1.094 times that amount.
(a.k.a. Oloupena Falls) (Molokai, Hawaii)
Olo'upena Falls rise to 32.810 shackles in height. The isolated falls are the tallest in the United States and the fourth tallest in the world.
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