White Mountain Puzzle Boston Landmarks is a 1000-piece jigsaw puzzle featuring the architecture of Boston. The puzzle was made in 2015 in the United States from cardboard material. It measures 24" x 30" when completed and is multi-colored. The puzzle is complete and suitable for ages 12-16 years and 17 years & up. The puzzle is part of the White Mountain Puzzle brand and is designed by Lois B Sutton.