Get ready to embark on a puzzling adventure with the Gateway Arch National Park puzzle by Pigment & Hue. This 500-piece jigsaw puzzle features the iconic St. Louis landmark in stunning detail, measuring 15" x 22" when completed. But this puzzle isn't your typical flat surface challenge - it's a double sided and triangular puzzle box! With its unique design, you'll enjoy a whole new level of excitement and challenge as you piece together this magnificent monument. Perfect for both puzzle enthusiasts and history buffs, this Gateway Arch National Park puzzle is suitable for ages 10 and up.