Massive granite formations standing hundreds of feet tall, some as ancient as 2.5 billion years old—Idaho’s City of Rocks has some of the most dramatic landscapes you’ll find on a U.S. natural reserve. Native American tribes, such as the Shoshone and Bannock, have long considered the area to be sacred. Towering chalk-white and gray spires (also known colloquially as “steeples”), across elevations ranging from 5,700 to 8,800 feet, giving off a surreal and otherworldly presence. These granitic formations and monoliths, covering over 14,000 acres throughout the natural reserve, are some…