Diamond Head, a volcanic cone of solidified ash on the island of Oahu, Hawaii. It rises above the ocean near the eastern end of Honolulu's Waikiki Beach, reaching 761 feet (232 m) above sea level. The cone was formed by explosive eruptions that left a wall of ash around a volcanic vent. Diamond Head's name comes from crystals found in the cone that at one time were believed to be diamonds.
Missouri River, one of the largest rivers in North America and a chief tributary of the Mississippi.
America is a big ole place. Did you know that there are 50 states that constitute the U.S.? That question is about as easy as it's going to get on this quiz, so it’s time to see if your smarts go deeper.