Challenge of the McKennas, also known as One Dollar and a Tomb (Italian: La sfida dei MacKenna; Spanish: Un dólar y una tumba) is a 1970 western film directed by León Klimovsky, produced by José Frade, written by Pedro Gil Paradela, scored by Francesco De Masi, and starring Robert Woods, John Ireland, Roberto Camardiel and Annabella Incontrera.