Simon Fraser University’s David Burley says his latest finds from the Nukuleka archeological site on one of Tonga’s southern islands shows it was the principal “founding settlement” of Polynesia about 2,800 years ago, and endured long enough for a genetically and culturally distinctive people to evolve and begin spreading across the immense “Polynesian triangle” bounded by Hawaii in the north, New Zealand in the southwest and fabled Easter Island in the far southeast, not far from the coast of South America.

So you’d expect Tonga to have a pyramid or ancient structures of some type. Like Tonga-Tabu, 2 pillars 4.88 meters high, weighing approx. 50 tons, supporting a 5.79 meter lintel:

And don’t forget the “burial mounds” which are actually short step pyramids using megalithic blocks:

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Megalithic Pacific