Crater of Diamonds State Park – North America’s largest diamond (40.23 carats) and more than 70,000 other diamonds have been found in a field south of Murfreesboro since farmer John Huddleston discovered the first such gems there in 1906. Now the eroding surface of a volcanic pipe located about three miles south of Murfreesboro is preserved as Crater of Diamonds State Park, the world’s only site where, for a small fee, anyone can dig for diamonds and keep what they find. The park’s visitors center offers an audio-visual presentation giving tips on diamond hunting, a display of diamonds in the rough, and exhibits detailing the site’s history and geology. The park also has a campground, hiking trail, a picnic and play area, and a water play area. A rainbow-trout fishery is located on the Little Missouri River below the Narrows Dam some nine miles north of the park. The Arkansas Game and Fish Commission stocks trout there from late fall through April. (870) 285-3113; www.craterofdiamondsstatepark.com.