Remembering History: January 11, 1908, President Theodore Roosevelt made the Grand Canyon a National Monument. "Do nothing to mar its grandeur, for the ages have been at work upon it and man cannot improve it. Keep it for your children, your children's children and all who come after you."

January 11, 1908, President Theodore Roosevelt made the Grand Canyon a National Monument. "Do nothing to mar its grandeur, for the ages have been at work upon it and man cannot improve it. Keep it for your children, your children's children and all who come after you."

January 11, 1908, President Theodore Roosevelt made the Grand Canyon a National Monument. "Do nothing to mar its grandeur, for the ages have been at work upon it and man cannot improve it. Keep it for your children, your children's children and all who come after you."