Next weekend is Open House New York. from their web site:
"To celebrate the city’s architecture and design, the 9th Annual openhousenewyork Weekend will once again unlock the city, allowing New Yorkers and tourists alike free access hundreds of sites talks, tours, performances and family activities in neighborhoods throughout the five boroughs. From private residences and historic landmarks, to rooftop farms and sustainable skyscrapers, OHNY gives you rare access into the extraordinary architecture that defines New York City, while introducing you to the people who make the city a vibrant and sustainable place to live, work, and play."
This year, the TWA Flight Center is one of the attractions, open Sunday, October 16: 01:00 pm - 04:00 pm: