The 11th annual Open House New York (Sat 12 and Sun 13; various locations, times and prices; visit ohny.org for details) lets you go behind the usually closed doors of some of the city’s coolest buildings and venues. While some hot-ticket items—including tours of 4 World Trade Center (Sat 12 at noon, 2, 4pm)—require a $5 reservation, most are free and don’t necessitate booking ahead. There are about 200 sites, events, talks and tours throughout all five boroughs; here are five of our favorites.
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