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No. 36: Nov-Dec 1984

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The Great Wall Of The Incas

The Inca's ability to build with stone is well-known. But one of their most ambitious projects is rarely mentioned in the literature and is poorly investigated in the field. Probably no more than 150 miles in length, it cannot compare with China's Great Wall. Still, it is built at altitudes of 8,000-12,000 feet in extremely rugged terrain. It runs along high ridges and is studded with stone forts at strategic intervals. Even though the Inca Wall is only a few feet high, it would certainly slow down a force charging up precipitous terrain at two miles altitude. The true extent and condition of the Inca Wall is not accurately known. Only a few easily accessible sections have been checked out. The theory is that the Incas built it to discourage invasions by lowland Indians. Like all Great Walls, it seems to have met with only small success.

(Paddock, Franklin K.; "The Great Wall of the Inca," Archaeology, 37:62, July/ August 1984.)

Comment. The Great Wall of the Incas is located in Bolivia. There is another Great Wall in Peru that seems to have been built by the Chimu people, perhaps to defend themselves against the Incas! The Chimu Great Wall averages 7 feet in height and reaches 20-30 feet where it crosses gullies. Also incompletely explored, it may run some 60 miles. For a more complete description, see our Handbook Ancient Man. Information on this book is located here.

From Science Frontiers #36, NOV-DEC 1984. 1984-2000 William R. Corliss

Science Frontiers Sourcebook Project Reviewed in:


  • "A sourcebook of unexplained phenomena is therefore a valuable addition to a collection of scientific literature. William R. Corliss has provided this in the past with his source books of scientific anomalies in several subjects, and now he has provided it for astronomy. He has done an excellent job of collecting and editing a large amount of material, taken in part from scientific journals and in part from scientific reporting in the popular or semi-scientific press." -- "The Mysterious Universe: A Handbook of Astronomical Anomalies", reviwed by Thomas Gold, Cornell University, in Icarus, vol.41, 1980

  • "An interesting, systematic presentation of unusual weather [..] This book is recommended for a general audience" --"Corliss, William R., Tornados, Dark Days, Anomalous Precipitation, and Related Weather Phenomena, Sourcebook Project, 1983.", revieweed in Choice, September 1983
  • "..the science is necessarily somewhat speculative, but Corliss's symthesis is based on reputable sources." -- "Corliss, William R. (Compiler). Lightning, Auroras, Nocturnal Lights, and Related Luminous Phenomena" reviwed by Joseph M. Moran, Univ. of Wisconsin in Science Books and Films, Sep/Oct 1983

  • "Before opening the book, I set certain standards that a volume which treads into dangerous grounds grounds like this must meet. The author scrupulously met, or even exceeded those standards. Each phenomenon is exhaustively documented, with references to scientific journals [..] and extensive quotations" -- "Book Review: The moon and planets: a catalog of astronomical anomalies", The Sourcebook Project, 1985., Corliss, W. R., Journal of the Royal Astronomical Society of Canada, Vol. 81, no. 1 (1987), p. 24., 02/1987