Cave-In-Rock State Park is located in southern Illinois, near the border with Kentucky. The park is named after a large limestone cave that was once used as a hideout by river pirates in the 18th and 19th centuries. Today, the park is a popular destination for hiking, camping, fishing, and boating.

One of the main attractions in the park is the cave itself, which is open for tours during the summer months. Visitors can explore the cave's many chambers and learn about its history as a pirate hideout. Other points of interest in the park include the scenic hiking trails, the rock formations along the Ohio River, and the many species of birds and wildlife that can be spotted in the area.

The best time to visit Cave-In-Rock State Park is during the spring and fall, when the weather is mild and the foliage is at its most colorful. Summer can be hot and humid, but it's also the busiest time of year, with many events and activities taking place in the park.

Overall, Cave-In-Rock State Park is a beautiful and historic destination that offers something for everyone. Whether you're interested in history, nature, or outdoor recreation, this park is definitely worth a visit.