Plot: Was the remarkable mountain-carved city of Petra once ruled by women? Did the Knights Templar belong to an obscure cult that worshipped John the Baptist? Did the Pueblo civilization of Chaco Canyon practice cannibalism? Sacred Sites spans the globe to visit some of the world's most remarkable ancient religious structures. Through recent archaeological discoveries and scientific breakthroughs, we offer fresh insights into the civilizations that built these sites, and examine their sometimes controversial, taboo practices