Wikimedi'Òc

Robert Duncanson - Blue Hole, Little Miami River.JPG - Rfdarsie

"Blue Hole, Little Miami River" - NARA - 559059.jpg - US National Archives bot

Blue Hole, Flood Waters, Little Miami River, by Robert S. Duncanson, 1851, oil on canvas - Cincinnati Art Museum - DSC04597.JPG - Daderot

Robert S. Duncanson - Blue Hole, Flood Waters, Little Miami River - Google Art Project.jpg - DcoetzeeBot

Blue Hole, in Little Miami River.jpg - Jvallmitja