Each year, nearly three million people visit South Dakota's Black Hills to get a glimpse of Mount Rushmore, where the carved busts of four American presidents stand six stories tall. As grandiose as the monument is today, its original vision was even more so. There's no better evidence for that than the fact that the monument's equally grandiose artist began work on a hidden room within the mountain, designed to inform future civilizations about why the sculptures were there.
Written by Ashley Hamer January 10, 2018
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