by Marcos Maté
FEVE U10B puzzle, based on an original photo by Marcos Maté (photo copyright Marcos Maté -- used with permission). Photographed at Burtzeña/Barakaldo (Vizcaya), Spain, May 9, 2016.
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.