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geology

Saipan's Grotto

A natural cavern connects with the ocean through submerged openings.

Northern Mariana Islands

Illustration of Saipan's Grotto
Saipan's Grotto · USURPR illustration

The story behind the place

Saipan's Grotto is a natural sinkhole linked to the sea by three submerged tunnels. Its changing blue light comes from that relationship between the enclosed space and open ocean. The site is a distinctive coastal formation whose physical connections can be explored through careful observation, while strong currents make its waters hazardous.

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Read more from the sources

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