CLARKSVILLE, Ind. (AP): A group that promotes and raises money for southern Indiana's Falls of the Ohio State Park has obtained a $500,000 grant to help upgrade the park's well-worn exhibits.

A challenge grant that began in April required the Falls of the Ohio Foundation to raise $1 million in order to receive a $500,000 matching grant from the Louisville, Ky.-based James Graham Brown Foundation. The News and Tribune reports the Indiana foundation topped that goal by raising $1.24 million.

The featured attraction at the state park near the Ohio River town of Clarksville is a 400-million-year-old fossilized coral reef. But many of the park's current interpretative exhibits are nearly 20 years old and in need of renovation or replacement.