The best way to enjoy Manhattan is from Brooklyn. Transmitter Park offers views without the crowds, and you can pick up coffee-to-go and treats from nearby Ovenly. The India St/Greenpoint Ferry is a 5 minute walk and will take you all the way to the Rockaways in the Summertime.
I’m a big fan of libraries (tons of books, free to take out, I mean what’s not to love?) and even though you can’t actually take out any books at the big beautiful library in Midtown – it’s still worth a visit. I love walking around in the big halls, the architecture is so beautiful and there’s always small exhibitions or things to see. Don’t forget to look up when entering the main reading-hall. Feels like book-heaven!