Up to 610 m deep valley with steep walls and several large waterfalls, including Hiilawe Waterfall. Contains the steepest paved road in US and possibly, world. The average grade of this road is 25%.

Location, GPS coordinates: 20.1186 N 155.59448 W
Categories: Rock formations, Canyons and ravines
Values: Geology, Visual
Rating: 3.5 out of 10 stars
Where is located? Oceania, United States, Hawaii, Hawai’i, northern part of the island

Waipio Valley on the map
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