A tower on the hike to Horseshoe and Hackberry. June 23, 2012 by Matt ThomasA tower on the hike to Horseshoe and Hackberry. 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:A tower on the hike to Horseshoe and Hackberry.