Purchase tickets inside. Only residents of New York and supporters of the museum get in for free.
They sell the entrance for $ 23 at the entrance to the Museum. But there is the option to request a "suggested contribution" entry, which will pay you the amount you would like to give. (Usually little used) But there may be limitation to some attractions.
Pay-what-you-wish General Admission is available at ticket counters inside the Museum only, and gives access to 40+ permanent galleries, including the Rose Center for Earth and Space. For admission to special exhibitions, films, and the Space Show, a +One or +All ticket is required. These can be purchased online in advance, or at the Museum. https://ticketing.amnh.org/
Purchase at the entrance
Purchase at door
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