Mysterious rocks in a Northern Valley

Walk through Muong Hoa valley of Sapa district, Lao Cai province, and you will stumble upon a scattering of large stones engraved with decorative patterns. The stones are made of quartz, sometimes over ten meters long, and are strewn about the sloping mountainsides, fields and streams. To this day, the creators of these mysterious engravings remain unknown.

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