Maui, known as the magic isle as well as the valley isle, is considered by many to be the most romantic island of the major Hawaiian Islands.
Although it's the second largest Hawaiian Island, it seemed to us to have a much more laid back feel than Oahu. Even though the Haleakala Volcano gets most of the headlines with its famed sunrise above the clouds and the bike ride down its slopes, it's the eastern slopes of Haleakala that give rise to most of the island's moist windward side. This means waterfalls are plentiful. In fact, you might see so many waterfalls here that you could end up suffering from a case of waterfall fatigue like we did.
Cutting through this wet windward side of Maui is the Highway to Hana. Along this road, we saw the majority of the island's numerous waterfalls - from a short jaunt away from the road to more involved hikes and scrambles. And even though the name Highway to Hana might suggest the journey ends at the town of Hana, don't stop there!
Beyond Hana, the famed Ohe'o Gulch (once dubbed the Seven Sacred Pools) is also on the eastern windward regions. In addition to picturesque swimming holes, Ohe'o Gulch features the 400ft Waimoku Falls - one of the few waterfalls of this calibur that is accessible to the public.
On the smaller western side of Maui, a few scattered waterfalls can be found. Among its western falls, however, is said to be the tallest waterfall on the island - Honokohau Falls. This waterfall, which we were only able to see by air, was said to have made a cameo appearance in one of the Jurassic Park movies. [source]