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Cal Academy of Sciences: Neighborhood Free Days | Hayes Valley & Mission Bay

Each San Francisco neighborhood (defined by zipcode) can visit the California Academy of Sciences for free over a three-day weekend (Friday, Saturday, or Sunday) in the spring and fall of each year.So that means as long as you have a driver’s license or other proof of residency, you can save yourself $35.95 and visit the museum for free. Read the full rules.The Rules: Each visiting adult must show a valid photo ID with proof of residency (you may not bring out of town guests for free; they still have to pay). Visiting adults are limited to six children for free entry.