General Note: Provides access to enhanced content that includes audio and video clips, web links, quizzes, activities, and a slide show.Includes index.
Formatted Contents Note: What is Machu Picchu? -- A step back in time -- Machu Picchu's location -- The agricultural sector -- The urban sector -- Big ideas behind Machu Picchu -- Science at work at Machu Picchu -- Machu Picchu's builders -- Similar structures around the world -- Issues facing Machu Picchu -- Make a star clock -- Machu Picchu quiz.