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.
Describes the features and uses of various types of maps, including physical, topographic, political, road, population, economic, resources, and environmental maps as well as navigational and weather charts.
Describes the history and natural beauty of the Great Barrier Reef, and discusses its ecological troubles and efforts to conserve its resources. Includes a glossary, color photographs, and Internet links.