Some of America’s most impressive National Parks are actually below the surface of the Earth! Case in point, not only is Mammoth Cave National Park stunning and beautiful in its size and unique shape, it is also the longest cave in the world. The cave has more than 400 miles of surveyed passages, with more being discovered each year! As one can imagine, the cave system earned its name “Mammoth” because it would take visitors weeks spent underground to explore all that the cave has to offer. Geologists spend years going in and out of the cave just to study a few of the hundreds of passageways. Thankfully, many of the cave’s most spectacular attractions can be seen in a day. Some of the underground pools are visible on the tours, others are not accessible to the average visitor. Inspired by the cave and its majesty, Anderson Design Group poster artists created vintage national park poster art of Mammoth Cave National Park. Available as a print, banner, canvas, sign, notecard, or postcard, this artwork would look stunning on any wall. And to learn more about the cave system, visit the website for the Friends of Mammoth Cave National Park.