Best Shopping: Madison Avenue from 59th street to the 90's is home to Tom Ford, Giorgio Armani, Calvin Klein, Luca Luca, Hermes, Carolina Herrara and almost every high fashion designer and jeweler has an outpost here. Hotels like the Mark, Pierre and the Carlyle, where major celebrities and other dignitaries stay, are super luxury. Numerous art galleries and the Whitney Museum are an art lovers dream. Outdoor cafes are plentiful and peopled with the jet-set who lunch, in between their spa and salon visits. You will see celebrities as this is where they shop --look for the limo and driver outside Barney's. TRAIN: F to Lexington Ave-63rd St; N, R, W to 5th Ave; 4, 5, 6 to any stop between 51st St and 96th St.