What is made of colossal concrete blocks and holds back a huge lake? If you guessed the Hoover Dam, you're right! This book introduces early readers to a mystery American place by describing its features, one by one, using short simple sentences and eye-popping full-color photos. At the end of the book, the secret place is revealed across a colorful, two-page spread. Young children will love showing off their beginning reading skills as they learn about amazing American places--one clue at a time! Fast facts and maps at the end of the book provide key information about the place. Rich, colorful photos and a clever design are sure to grab and excite emergent readers.