Echo Underground River Mammoth Cave Vintage Poster Travel Tourism 9x12

This vintage poster is a medium-sized, unframed piece of art that showcases the beauty of Mammoth Cave in Kentucky. The poster features a stunning image of the underground river that flows through the cave, and is sure to be a unique addition to any collection. The poster is a licensed reprint, made from high-quality paper, and measures 9x12 inches. Whether you're a fan of the natural wonders of the United States or simply appreciate the beauty of vintage travel posters, this piece is sure to catch your eye.