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| | Piedras Negras - HighBeam Encyclopedia (Site not responding. Last check: ) |
 | | PIEDRAS NEGRAS [Piedras Negras] [Span.,=fl stones], ruined city of the Classic era of the Maya, NW Petén, Guatemala, in the Usumacinta valley. |
 | | Guardian of the Acropolis: the sacred space of a royal burial at Piedras Negras, Guatemala.(Reports) |
 | | PIEDRAS NEGRAS, MEXICO -- A bus lies on its side in the Escondido River in Piedras Negras, Mexico, on Monday, April 5, 2004. |
| www.encyclopedia.com /doc/1E1-piedrsnguat.html (296 words) |
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