The Proof Is Out There: Ancient Petroglyph of an Unsolved Maze (Season 3) January 5, 2023 Unipro2013main History History Documentaries A mysterious bolder in Hemet, CA depicts drawings of an ancient petroglyph. See more in this clip from Season 3, “Marble Mountain Bigfoot, Waldek Mine Whispers, and UFO Buzzes Jet.” Credit HISTORY Please support our Sponsors here :