August 23, 2008 12:00 AM

Peru's Cuzco once center of 10,000-foot-high empire

Explorer, author and wilderness educator Josh Bernstein is host of Discovery Channel's “Into the Unknown” program, shown at 10 p.m. Mondays. The 37-year-old New Yorker's episode on the vanished Chachapoya tribe of northern Peru will air in September. One of his favorite places is Cuzco, in Peru's southern mountains.

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