National Museum of Mathematics (MoMath) in New York City

The National Museum of Mathematics or MoMath is a mathematics museum in Manhattan, New York City. It opened on December 15, 2012, with over thirty interactive exhibits. 

Click on the image.

The mission of the museum is to "enhance public understanding and perception of mathematics". The museum is known for a special tricycle with square wheels, which operates smoothly on a catenary surface.