Horseshoe and Hackberry overlooked this vast canyon. June 23, 2012 by Matt ThomasHorseshoe and Hackberry overlooked this vast canyon. Hovenweep National Monument About Matt Thomas Matt is an avid writer and explorer, who loves to showcase his home state of Colorado. His favorite place to be is right here in the Centennial State. Previous Post:Horseshoe and Hackberry overlooked this vast canyon.