Code: S1558 Member Price: $3.38 Non-Member Price: $3.95
These sheets of commemorative national park stamps are produced yearly. Each stamp includes a full-color photograph of ten national park areas and information about their importance. Stamps may be placed in the designated area in the Passport book (see below for more information). The 1991 series features the following National Park Service areas: Lowell National Historical Park, Valley Forge National Historical Park, The Washington Monument, Mammoth Cave National Park, Muir Woods National Monument, Indiana Dunes National Lakeshore, Bandelier National Monument, Fort Union Trading Post National Historic Site, USS Arizona Memorial, and Klondike Gold Rush National Historical Park.
See below for additional passport stickers from other years.