That's right, a museum all about math! How cool is that? The Museum of Mathematics will officially open its doors in Manhattan some time next year. Here's the mission of the museum.
Mathematics illuminates the patterns that abound in our world. The Museum of Mathematics strives to enhance public understanding and perception of mathematics. Its dynamic exhibits and programs will stimulate inquiry, spark curiosity, and reveal the wonders of mathematics. The museum’s activities will lead a broad and diverse audience to understand the evolving, creative, human, and aesthetic nature of mathematics.
You can read more about it in the NY Times article Many Variables in a New York Math Museum.