Geronimo Stilton's "The Race Across America" also describes an interesting landmark in Colorado.
On Page 80 the author tells us, "In the sixteenth century, Spanish explorers named the area Colorado because of its red-colored earth. Colorado means "red" in Spanish. Colorado has fifty-four mountain peaks that are more than 14,000 feet high. Colorado National Monument preserves 32 square miles of canyons and mesas sculpted from years of erosion. A few miles west is Miracle Rock, a huge sandstone outcropping perched on a narrow cliff. It may be the biggest wobbly rock in the world."