What is Chichen Itza? -- A Step Back in Time -- The Location of Chichen Itza -- Outside Chichen Itza -- Inside Chichen Itza -- Big Idea Behind Chichen Itza -- Science at Work in Chichen Itza -- Builders of Chichen Itza -- Similar Structures Around the World -- Issues Facing Chichen Itza -- Activity -- Quiz -- Glossary.