The product is a vintage linen postcard featuring the Castle Geyser eruption in Yellowstone National Park. This original postcard from Johnston Bordewyk, Inc. captures a moment in the early to mid-20th century era of the national park's history. Measuring at a standard size of 5.5 x 3.5 inches, this postcard from the United States showcases the beauty and majesty of Yellowstone, making it a desirable collectible for enthusiasts of national parks and topographical postcards.