5 Most secret and amazing swimming pool of the world

This natural swimming pool on a volcanic Samoan island offers visitors the ultimate experience in relaxation. To Sua Ocean Trench, which literally translates as 'big hole,' is located in Lotofaga village, on the south coast of Upolu island in Samoa.

When the volcanoes erupted on the island, much of the ground fell away, and this 98-foot deep hole was the result. The pool is maintained by water flowing in from the South Pacific Ocean through a number of channels and tunnels.

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