Maui Waterfalls - Honokohau Falls It’s very GREEN here. I photographed these waterfalls from an open helicopter (doors off) near the summit of Puu Kukui in the West Maui Mountains, Maui, Hawaii. Honokohau Falls is said to be the tallest waterfall on Maui. It plunges in two tiers for a total of 1600 feet — making it the second highest falls in the United States (only Yosemite Falls is higher). Puʻu Kukui is one of the wettest spots on Earth and the second wettest in the state of Hawaii after Mount Waiʻaleʻale, receiving an average of 386.5 inches (9,820 mm) of rain a year!