California Academy of Sciences
The amazing, family-friendly California Academy of Sciences in San Francisco features the world’s only aquarium, planetarium, rainforest, and natural history museum, all under one living roof.
It's conveniently located on Music Concourse Dr in Golden Gate Park. Other attractions, like the de Young Museum, the Botanical Gardens, and 412 hectares of urban park are right outside its doors.
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Need one full day to cover.