by Frank Orona
Norfolk Southern ES44DC puzzle, based on an original photo by Frank Orona (photo copyright Frank Orona -- used with permission). Photographed at Opelika, Alabama, September 14, 2018.
The "Easy" version of the puzzle has about 100 pieces, "Medium" has about 200 pieces, "Hard" is about 300 pieces. For the Online puzzles, see the Online Puzzle Tips.