Across
- 2. The first presidential inauguration: George Washington took the oath of office in New York City on April 30, 1789.
- 6. The first umbrella factory in the U.S., 1928, Baltimore
- 7. “Smokey Bear,” a cub orphaned by fire in 1950, buried in Smokey Bear Historical State Park in 1976
- 9. The typewriter, invented in Milwaukee in 1867
- 11. The only active diamond mine in the U.S.
- 13. The most crayfish: 98% of the world's crayfish
- 17. The Girl Scouts, founded in Savannah by Juliette Gordon Low in 1912
- 19. The only royal palace in the U.S. (Iolani)
- 20. The first American cookbook, published in Hartford in 1796: American Cookery by Amelia Simmons
- 25. has more than 100 volcanoes and volcanic fields
- 27. Mark Twain and some of his characters, such as Tom Sawyer and Huckleberry Finn
- 28. The first electric traffic lights, invented and installed in Cleveland in 1914
- 29. The world's first drive-in movie theater, built in 1933 near Camden
- 30. The oldest rock in the world, 3.8 billion years old, found in Minnesota River valley
- 31. Rainbow Bridge, the largest natural stone bridge in the world, 290 feet high, 275 feet across
- 34. The world's largest silver nugget (1,840 pounds) found in 1894 near Aspen
- 35. Rare fish such as the Devils Hole pup, found only in Devils Hole, and other rare fish from prehistoric lakes; also the driest state
- 36. The tallest building in the U.S., Sears Tower, in Chicago
- 40. The world's smallest park, totaling 452 inches, created in Portland on St. Patrick's Day for leprechauns and snail races
- 42. The Cereal Bowl of America, Battle Creek, produces most cereal in the U.S.
- 44. Graceland, the estate and gravesite of Elvis Presley
- 45. NASA, in Houston, headquarters for all piloted U.S. space projects
- 46. The famous car race: the Indy 500
- 48. The world's largest natural, indoor warmwater pool, Evans' Plunge in Hot Springs
- 49. The longest main street in America, 33 miles, in Island Park
- 50. The first magazine in America: the American Magazine, published in Philadelphia for 3 months in 1741
Down
- 1. Artificial rain, first used near Concord in 1947 to fight a forest fire
- 3. The first parking meter, installed in Oklahoma City in 1935
- 4. U.S. spacecraft launchings from Cape Canaveral, formerly Cape Kennedy
- 5. Marbles; most of the country's glass marbles made around Parkersburg
- 8. Virginia Dare, the first English child born in America, on Roanoake Island in 1587
- 10. Lunar Rover, the vehicle used by astronauts on the moon; Boeing, in Seattle, makes aircraft and spacecraft
- 12. “General Sherman,” a 3,500-year-old tree, and a stand of bristlecone pines 4,000 years old are the world's oldest living things
- 14. The first log cabins in North America, built in 1683 by Swedish immigrants
- 15. Rhode Island Red chickens, first bred in 1854; the start of poultry as a major American industry
- 16. Helium discovered in 1905 at the University of Kansas
- 18. The largest underground cave in the world: 300 miles long, the Mammoth-Flint Cave system
- 21. The only roller skating museum in the world, in Lincoln
- 22. The first World Series, 1903: the Boston “Americans” (became the Red Sox in 1908) vs. the Pittsburg Pirates (Pittsburgh had no “h” between 1890–1911)
- 23. The most telescopes in the world, in Tucson
- 24. The largest production of maple syrup in the U.S.
- 26. Coca-Cola, first bottled in 1894 in Vicksburg
- 32. The “Register of the Desert,” a huge granite boulder covering 27 acres with 5,000 early pioneer names carved on it
- 33. Windshield Wipers Were Invented here
- 37. The geographic center of North America, in Pierce County, near Balta
- 38. The first tea farm in the U.S., created in 1890 near Summerville
- 39. The only full-length statue of George Washington, placed in capitol in 1796
- 41. Grasshopper Glacier, named for the grasshoppers that can still be seen frozen in ice
- 43. The shortest and steepest railroad in the U.S., Dubuque: 60° incline, 296 feet
- 47. The most easterly point in the U.S., West Quoddy Head1