Troubled treasures : world heritage sites

Introduces the pyramids of Egypt, describes how they were built, and discusses the importance of their preservation.

Overview of the history of Stonehenge discusses its original purpose, how it was built, where it is, why it is considered a threatened monument, and what is being done to conserve it.

Provides information about the Galapagos Islands, including the archipelago's formation, Darwin's theory of evolution, and today's conservation efforts.