Waimea Valley is very green. Lots of plant life within this huge botanical garden. But flowers are in short supply at this attraction. The self-guided tour takes you along various paths, and past replicas of ancient Hawaiian dwellings. The 3/4-mile, hike ends at a waterfall that you can swim up to. The water is 30 feet deep in most areas, so make sure you can swim or float. Lifeguards are present and life vests and other floatation devices are also available.
At $15 per adult, the admission to Waimea Valley is high, considering that there's not a whole lot to see. If you don't want to walk to the falls, you can catch a ride on an electric cart for $4 (one way). A gift shop, snack bar and restrooms are all located at the visitor center, before you enter the paid area.
Because swimable waterfalls are hard to find on Oahu, only go to Waimea Falls if you really, really want to swim up to the falls. Otherwise, the $15 is a waste of money. The Foster Botanical Garden in Honolulu is much better, and cheaper at only $5 per person.
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