An atlas of Earth’s mysterious places — megaliths, pyramids, lost and sunken cities — with the evidence shown plainly: what is verified, what is contested, and what is still unknown.

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Pictographs tagged “barrier”

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🇺🇸 United States · Rock art

Horseshoe Canyon — Barrier Canyon Great Gallery

Barrier Canyon Style (3000 BCE–500 CE) · Barrier Canyon archaic (pre-Fremont)

Horseshoe Great Gallery recorded by Schaafsma 1970s, Archaic Barrier Style before Anasazi.