pyramid

Pyramid
A pyramid (from Greek: πυραμίς pyramis)[1][2] is a structure whose outer surfaces are triangular and converge to a single point at the top. - https://en.wikipedia.org/wiki/Pyramid

Wikipedia
https://en.wikipedia.org/wiki/Pyramid

Notable Pyramids
Teotihuacan Monte Alban

Earth Pyramid
http://www.earthpyramid.org http://www.earthpyramid.org/faq https://twitter.com/earthpyramid https://www.facebook.com/earthpyramid

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Other Pyramids
https://twitter.com/PyramidABC pyramidtextsonline.com https://www. twitter.com/bennu

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