More destination ideas... http://www.petergreenberg.com UNESCO World Heritage sites includes some of the most beautiful, famous and historic landmarks around the world, from Australia's Great Barrier Reef to Egypt's Pyramids. But there are some that you may not have heard as much about--like Peru's "geoglyphs" of Nazca or the ancient center of Edinburgh. NBC Travel Editor Peter Greenberg shares some of his favorite UNESCO sites from around the world.