| 21. | Some of the petroglyphs are aligned with certain annual solar events.
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| 22. | There are ten figures in the Picture Rock Pass petroglyph group.
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| 23. | Petroglyphs are carved into many of the faces of the cliffs.
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| 24. | The wadi is named after its valley's many petroglyphs.
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| 25. | A dozen families had lived here, leaving behind petroglyphs and pictographs.
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| 26. | For many, the petroglyphs are the main attraction at Grapevine Canyon.
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| 27. | COA VALLEY PETROGLYPHS, Vila Nova de Foz Coa, Portugal
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| 28. | The location and distribution of petroglyphs could help scientists decipher their meaning.
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| 29. | Teepee rings, chippings, petroglyphs and altars have been found there.
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| 30. | In the near distance was the ridge with the petroglyphs.
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