On the Hawaiian islands, there are many accessible waterfalls with paved paths and rails. For instance, Rainbow Falls on the Big Island is a five-minute drive from Hilo. With the weather coming from the east, one sunny mornings, a rainbow appears from the lookout.
What is not commonly known is that the pool of the falls takes the shape of the Big Island itself. This link is to sixteen popular waterfalls throughout the Hawaiian islands: https://www.hawaii.com/discover/waterfalls
Visiting the Hawaiian islands, it is necessary to show respect for the land and its people. This video is an example of what not to do: