Independence Hall, the St. Louis Arch, the Golden Gate Bridge and other manmade landmarks help tell the story of America — but only up to a point. The country's deep past is also recorded in geology.
In days gone by, settlers and explorers used our natural wonders as navigational tools. Now, these rock formations are popular vacation destinations. The Grand Canyon, for instance, attracted 6.3 million visitors in 2018 alone. During that same year, some 11,000 outdoor enthusiasts sought permits to climb Mount St. Helens in Washington state. We're drawn to such places because of the stunning views they offer, and the sense of awe they inspire.
And knowing a little bit about how awesome landmarks like Nebraska's Chimney Rock or North Carolina's Pilot Mountain formed will only enhance your appreciation for them. To that end, we're throwing a salute to some of America's geological treasures.