things to do in nyc in the winter?
['Marvel at the Rockefeller Center Christmas Tree. ... ', 'Go Ice Skating in Bryant Park. ... ', 'Admire the Holiday Windows on Fifth Avenue. ... ', 'Sip Frozen Hot Chocolate at Serendipity 3. ... ', 'Shop at the Union Square Holiday Market. ... ', 'Visit the Indoor Brooklyn Flea. ... ', 'See the New York City Ballet.']