21. Which Iowa city is known for its annual RAGBRAI event, one of the oldest and longest recreational bicycle touring events in the world?
22. What is the official state rock of Iowa, known for its abundant fossils and limestone formations?
23. The Herbert Hoover National Historic Site, preserving the birthplace and burial site of President Hoover, is located in which Iowa town?
24. Which Iowa-born actress, known for her roles in "The Bridges of Madison County" and "Frances," won two Academy Awards for Best Actress?
25. The Iowa State Capitol, an iconic building in Des Moines, features a golden dome made of which material?
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