Prehistoric Architecture

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Thousands of structures survive all over the world with no indication of why they were built. Prehistory not only means before history, it also means before writing. Ancient cultures that did not develop writing systems remain a mystery. All that is left is their art and architecture and yet the rules of aesthetics seem to be the same all over the ancient world. Colossal was always impressive. Stone, when readily available lasted the longest. Through trial and error, balance between bolders and gravity allowed eerie structures to remain permanent. Their purpose and/or intention are lost with time. Perhaps the mystery behind them makes the structures even more beautiful and appealing.