Indiana's most visited natural and National Landmark. Two walking tours, gemstone mining, hiking, crawling tours, camping and picnicking. Located in the heart of Indiana's Cave Country, the park and nearby recreation area offer great opportunities for visitors with easy access to Interstate and major highways. Marengo Cave remains 52 degrees year-round. All tours are guided by knowledgeable, friendly guides on well-lighted tour trails. Comfortable walking shoes and a light jacket are recommended.