Mammoth Cave National Park is a protected wilderness like no other. For one, the park is almost entirely underground! Furthermore, this cave system is the longest known cave system on Earth and it features the richest known habitat for cave wildlife in the world. Mammoth Cave was designated an Area Biosphere Reserve by UNESCO in 1990. Artist collaborator Kenneth Crane worked with Anderson Design Group to hand-render this unique poster of the park. A perfect gift for cave lovers and National Park travelers alike, this artwork is available as a poster, print, canvas, canvas banner, metal sign, notecard, postcard, or framed postcard. And to learn more about the park or to plan your next trip there, be sure to visit the website for the National Parks Conservation Association.