Proof of full COVID-19 vaccination is now required for all visitors ages
12+. Plan your visit
Pi = 3.14159 (and an infinite number of decimal places after that). Pi Day, which is celebrated on 3/14 at 1:59 p.m., is an international holiday that was born at the Exploratorium. These videos capture Pi Day through the ages.
(Embarcadero at Green Street)
San Francisco, CA 94111
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