Biking tours let you cover more ground than walking tours – and give you a healthy dose of exercise to boot. Bike the Big Apple, recommended by NYC & Company (the official tourism authority of New York City and operators of www.nycgo.com), offers five set tours. Its most popular is the six-hour Back to the Old Country – the Ethnic Apple Tour, 12 miles of riding that covers Williamsburg, Roosevelt Island and the east side of Manhattan. Other tours visit the Bronx’ Little Italy, city parks, Brooklyn chocolate shops and Manhattan at night.