I'm not a New Yorker, but I visit this city enough to not be called a tourist. I'm not sure if this place has been mentioned before, but there's a huge segment of the Berlin Wall in a small park on 53rd St between 5th and Madison Ave.The Cloisters is a museum on the West Side located way up near 190th St. It features a large part of John Rockefeller's medieval art collection and features around 1,900 different exhibits. It is not a secret per se, but definitely worth a visit, if only to see the scenery of the Hudson and surrounding area (George Washington Bridge etc). I felt like I was somewhere in Europe while I was there yesterday. It is not on the typical tourist's map, which makes it better since its away from all the hustle. Prosperity Dumpling, ChinatownWith 1,200 reviews on Yelp, this place is definitely not a secret, but I doubt non-New Yorkers would know of this place. It is a hole-in-the-wall located in the heart of Chinatown, and serves delicious pork and chives dumplings at an extremely inexpensive price of $1.00 for 5 of them. My personal favorite is the Chicken Sesame Pancake, which costs around $2.50 per pancake. They also sell dumplings in bulk, which I imagine is at a cheaper per-unit rate than the retail price of 12.5¢ per dumpling. Its a great place to go to when you don't feel like spending 10 bucks on a lunch in NYC. DUMBO in Brooklyn (Down Under the Manhattan Bridge Overpass, right near the Brooklyn Bridge) features one of the most beautiful views of Manhattan, and is a great place to walk around and explore for those who want to get away from the hustle and bustle of Manhattan The real Halal Guys cart (53rd and 6th) only comes after 8pm. The others are just knock-offs.Even though tickets are sold out months in advance, you can become a part of the Saturday Night Live studio audience if you're willing to go to 30 Rockefeller at 7am for standby tickets. If you signNow there in time, you will most probably be able to become a part of the studio audience.The Jersey City Waterfront features some of the most spectacular views of the Manhattan skylineBelvedere Castle in Central Park (mid-park at 79th st) has an observation deck which offers beautiful views of Central Park and Manhattan. Speaking of Central Park, Strawberry Fields is John Lennon's memorial spread over 2.5 acres I haven't done this yet, but Shakespeare In The Park in the Delacorte Theater in Central Park is quite an experience. It is a free presentation of some of Shakespeare's most famous plays. It runs in the months of June and July every year. Best part is that tickets are free and are distributed on a first-come-first-serve basis.Shakespeare in the Park's performance of Romeo and Juliet Ice cream, milkshake and milk flavored like the milk that remains after you eat Kelloggs cereal, only at Momofuku Milk Bar in East Village (and other locations!)milkbarstore.comSeven Hills Cafe at 849 Manhattan Ave, Brooklyn serves the best hookah in New York City. Priced at only $10 per hookah (with the $5 Yelp check-in coupon), it features every imaginable flavor, great service (albeit a little slow) and lip-smackingly amazing Turkish and Lebanese food. That's all I can think of for now. I'll add more secrets as and when they come to mind.