It’s time to take a peek into the core of the Big Apple. The public will get a chance to see hidden places around New York City when the annual Open House New York festival returns Oct. 17-19, featuring a behind-the-scenes peek at more than 300 typically off-limits sites. “New York never feels more generous than during Open House New York Weekend, when 1,400 volunteers show tens of thousands of visitors their corners of the city,” Kristin LaBuz, executive director of the event said in a