The largest and most visitor-friendly of three national preserves along the Illinois River, Chautauqua spreads across more than 4,000 acres of woods and wetlands. The refuge can harbor more than 250,000 waterfowl and shore birds, including bald eagles (an eagle's nest is pictured at left). An easy trail leads to observation platforms along Lake Chautauqua. (309) 535-2290; Chautauqua National Wildlife Refuge
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