Fodor's Expert Review Merck Forest & Farmland Center

This 3,162-acre educational center has 30 miles of nature trails for hiking, cross-country skiing, snowshoeing, horseback riding, and rustic camping. You can visit the 62-acre farm, which grows organic fruit and vegetables (sold at the visitor center), and check out the horses, sheep, pigs, and chickens while you're there—you're even welcome to help out with the chores.