Explore some of the world's most impressive structures in this fascinating series. Each book explains when and how one structure was built, as well as the unique features that make it famous. This book describes the features, construction, and history of Hoover Dam. Short paragraphs provide easy-to-read text, while colorful photos make the book engaging and accessible. The book also includes a table of contents, fun facts, sidebars, comprehension questions, a glossary, an index, and a list of resources for further reading. AGES: 7 to 9