I’ve lived in New York for 13 years, and I only just discovered the secret sprinklers on top of the Natural History Museum…

The museum itself is amazing—with dinosaurs, monkeys and a giant blue whale (which gets vacuumed once a year) — but if you enter on the west side of the museum and head to the roof, you’ll find grass and sprinklers.

You don’t even need to buy a ticket! We’ve now hung out with friends there a few times, and it’s such an awesome place to hang out on hot days, whether or not you end up going inside the museum. If you want to make a day of it, you can grab lunch at Shake Shack across the street or walk a few blocks to Hampton Chutney, which has incredible dosas, a window seat and storybooks for kiddos.

The boys wore Old Navy basics, which were cute yet sturdy enough for running and splashing around. (Toby’s shorts were only $6!) Anton wore one of their little surf suits, which kept him covered up in the hot sun.

Did you guys already know about this? New York can be crazy, but then it goes and surprises you like this. :)

P.S. A secret restaurant and playground. Plus, 8 activities for kids in New York City.

(Thanks to Julia Robbs for snapping these photos. This post was sponsored by Old Navy, a brand we use all the time for our family. Thanks for supporting the brands that support Cup of Jo)