Throughout the ages and around the world, humankind has left a mark on our planet Earth. From Stonehenge to Mount Rushmore, we have created a gallery of grand endeavors that celebrates our beliefs, our triumphs, and our lives. We all know what the Golden Gate Bridge looks like. We can study its awesome span and impressive list of statistics. But let's look again. Can 99 words and 19 lines of acrostic poetry draw us a new perspective? Award-winning children's poet J. Patrick Lewis and the editors of National Geographic have come together to pay homage to a few of the great works and workers that have left behind their monumental mark.