Lewis and Clark Caverns is Montana’s first State Park and features a decorated limestone cavern lined with stalactites and stalagmites. There are various nature trails outside of the cave where you can go hiking, boating or camping. This park is full of wildlife including bats, birds, deer and coyotes, making it an ideal spot for bird watching, fishing and photography. The park area is open all year round, however the caverns are only open from May until the end of September each year. There are two visitor centers here that provide fascinating information about the park’s history and caverns. The Main Visitor Center focuses on the unique geology, flora and fauna, while The Cave Visitor Center provides insightful information into the caverns with a video, museum and cave exploration room.