Proof of full COVID-19 vaccination is now required for all visitors ages
12+. Plan your visit
When the disk is spun, the colors you see are illusions. This effect was popularized in 1894 by toymaker C. E. Benham, who called his spinning disk an “artificial spectrum top."
Where: Crossroads: Getting Started
(Embarcadero at Green Street)
San Francisco, CA 94111
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