The Mystery Behind The Ancient Stone City Of Nan Madol

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Nan Madol is located at the eastern coast of Pohnpei, Micronesia, and is unique because of what it is and how it was made. Nan Madol is a city spanning 80 acres, and comprises about 90 man-made islands. Nan Madol has earned the awe of many archaeologists because the islands are made almost entirely of basalt walls that are 18 to 25 feet high and about 17 feet thick.

Archaeologists estimate that a whopping 250 million tons of these basalt logs are needed to construct the whole city. But the question archaeologists have yet to answer is how these walls were constructed so high, given how heavy the basalt logs were. In fact, each basalt log can weigh as much as 50 tons.