NEW YORK — The Caroline is a residential apartment building located on 23rd St., between 5th and 6th Ave., smack in the Flatiron District of Manhattan. It has and offers just about everything the movies have taught us to expect from a luxury rental in NYC: 24-hour white-gloved doorman, concierge, piano lounge, billiards room, 12,000-sq.ft. landscaped roof deck, valet parking, linen service — the works. Units feature granite countertops and stainless steel appliances in the ...

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