Marengo Cave, U.S. National Landmark the most highly decorated cave known in the Interior lowlands, offers a contrast and variety of underground splendor unmatched in any single cave. Marengo Cave family friendly natural adventure-underground and above too! Take a leisurely tour through our spectacular Crystal Palace, pan for gemstones, twist and crawl through our cave simulator, or explore an undeveloped natural cave. You're certain to enjoy your stay!
