Rosyta
A must see
This is one of the museums that I suggest you cannot miss while you are in New York: four floors dedicated to design, with innovation and developments in its field over the last 50 years; and all brand new (opened in 2009) and high tech. The main staircase, for example, is built without pillars, but instead is suspended by thin steel cables. I recommend going there on a Thursday after 4 when entry is free and you can take advantage of the guided tours (about 45 minutes).
The guided tours are the only way to discover the many "hidden treasures" of the museum. The detail would be impossible to tell without a guide.
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