Kipu Falls, Kauai
Go to Kipu Falls - a freshwater Waterfall on "private" land at the end of Kipu Road. Even though it's private land, both locals and tourists visit.
On one side of the pond there is a 25 ft cliff with a rope swing that you can jump from. (It's in the Blue Kauai guidebook that everyone has...Kauai Revealed. If you swing, make sure to RELEASE on time - I had a slow release and hit the water flat on my back. I had bruises for 10 days!
Also, wear water shoes - hiking in and out is slippery and very WET.
One of my favorite places is in all of Hawaii is Kipu falls in Kauai. It is located near the Fish Pond close to the town of Nawiliwili. You must find a local map to get the exact location as it is off a secondary road.
Here the opening scene of Indiana Jones was filmed with all the natives and bow and arrows.
There are two banyan trees that grow right next to a falls that sits about 20 feet above the pool. One of the trees has a rope swing on it that allows you to swing way out in the middle of the pool. The water is warm and refreshing. The spot is really idyllic...