The most iconic sight at Colorado National Monument is this steeple named Independence Monument. The massive sandstone monolith reaches 450 feet into the air and is a looming challenge to experienced climbers. The first person to plant an American Flag at its peak was John Otto. His feat was accomplished in 1911 on July 4, hence the tower’s patriotic name. To make certain the moniker was lasting, Mr. Otto carved phrases from the Declaration of Independence at the base of the monument. He later became the park’s first ranger.