Libertyville, Ill. 60048
Cost: Free. Parking $10 Friday-Sunday and holidays; $5 Monday-Thursday. Residents free.
Hours: 6:30 a.m.-sunset daily. Visit website for marina and swim beach hours.
This 1,100-acre forest preserve offers a wide range of outdoor recreation and education opportunities centered on a 115-acre lake reclaimed from a gravel quarry. Featuring miles of trails, boat and bicycle rental, marina, swimming beach and the Children's Grove handicap-adaptable play area.