Plywood Caveman Cutout! Real Photo Postcard directing tourists to the Bluff Dwellers Cave in the Ozarks. The cave was discovered in 1925 and opened to the public two years later. Once inhabited by the "Ozark Bluff Dwellers" but sealed by a landslide 2000 or so years ago. The card is unmailed and not dated but likely not long after the owners opened it for tours. "SEE MY CAVE" roadside sign RPPC collection Jim Linderman