General admission tickets for four (4) to the California Academy of Sciences. 

The world's only aquarium, planetarium, rainforest, and natural history museum, 

all under one living roof. Come nose-to-beak with penguins and parrots, fly through the 

Universe in the world's largest all-digital planetarium, take a virtual safari in African Hall, and climb into the canopy of a living rainforest.
http://www.calacademy.org/