Walls were reenforced with concrete for modern safety. May 9, 2014 by Matt ThomasWalls were reenforced with concrete for modern safety. Manitou Cliff Dwellings Museum 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:Manitou Cliff Dwellings & Museum – Manitou Springs