Mark IV Monorail puzzle, based on an original photo by Charles Freericks (photo copyright Charles Freericks -- used with permission). Photographed at Las Vegas, Nevada, February 15, 1997.
Click here for more information about this photograph
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.