Hundreds of hidden NYC sites to open to the public — including secret gardens, abandoned post office

The annual Open House New York festival is set to take place from October 17-19, allowing the public to explore over 300 hidden sites across New York City, including secret gardens and an abandoned post office. This event is significant as it provides a unique opportunity for residents and visitors to discover the city's lesser-known treasures, fostering a deeper appreciation for its rich history and culture.