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South America

	The Ancient Walls: Enigma in the Andes - A slideshow of Andean archaeological sites by Richard Nisbet with a focus on Inca architecture and stonecutting. He suggests that the lower structure of Sacsahuaman is much older than c.1508. Rate this
	World Mysteries: Sacsayhuaman - Describes several Inca sites in Peru, with some speculation about alternative dating. Rate this