Did you know...
In 1869, John Wesley Powell's expedition down the Green and Colorado Rivers explored the last great unknown within the continental U.S. What canyons did they discover, name and chart during their treacherous journey through the American West?
Did you know...
In 1869, John Wesley Powell's expedition down the Green and Colorado Rivers explored the last great unknown within the continental U.S. What canyons did they discover, name and chart during their treacherous journey through the American West?