Venture under Indiana to discover the wonderful world of caves and caverns; Bluespring Caverns, Indiana Caverns, Marengo Cave and Squire Boone Caverns. Touring all four caves will allow you to see how different caves really are. Bluespring Caverns is an underground river that allows you to see the cave via a boat. Indiana Caverns is known for it's Ice Age Bones of many different animals during the Ice Age Period. Marengo Caves large rooms and abundance of formations will make you feel like you are in another world. Squire Boone Caverns allows you to get up close to all kinds of formations and see underground streams. Pick up your passport at the first cave you visit. When purchasing your tickets for the cavern tour have the clerk stamp your Indiana Cave Trail Card. Have each cave stamp your card when you purchase your tickets and at the last cave you will receive your Indiana Cave Trail T-Shirt. The trail will normally take two days. Please see website for hours of operation and details.