10) To Sua Ocean Trench, Samoa
Now here is a really unique way to enjoy some of the clearest, cleanest waters in the world. To Sua, or “Giant Swimming Hole” is accessible only by a ladder, so you will have to be motivated if you want to get to this Samoan landmark. Once you do, however, you will have an experience like no other. Located on the island of Upolu, To Sua is the result of volcanic activity, which left a 30m (just over 98ft) hole. The waters are an exquisite turquoise; and nearby, you can also find tide pools, blowholes and other natural delights. Testimonials from visitors attest to the thrill of swimming along with the vast numbers of tropical fish that populate the crystal clear water. There is a cave through which water continuously flows from the South Pacific Ocean; but you should avoid swimming through it unless you are a highly experienced diver.
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