100 things you should know about World Wonders takes you on a thrilling tour of mighty monuments and awesome natural features. Exactly 100 facts, accompanied by detailed artwork, bring to life ancient stone giants, undersea cities, and mighty migrations made by living things. Throughout there are puzzles, quizzes, and projects—get to grips with geysers and make water flow uphill. So get your walking boots on, prepare to be amazed, and take the trip of your life around the wonders of our world.