Two 100-piece Walden Pond jigsaw puzzles from The Shop at Walden Pond. Both feature full-color photographs by Barbara Olson. One is of Thoreau's Walden house site, with its tribute cairn. The other is a view of Walden Pond in full fall color. Each one contains 100 pieces and finishes to 9 x 12 inches. And both can be tricky to put together!