If you are interested in science, San Francisco's Exploratorium is for you. Mainly geared toward children and adolescents, the Exploratorium lets you explore scientific principles with real-world experiments. There are such exhibits as exploring how tornadoes work, how a seismograph works, how the human brain perceives its senses, etc. There is also a Tactile Dome that is immersed in complete darkness that you can work your way through by touch. The museum is really quite different from any other than I have ever found in my travels.
While I recommend it highly for families, I also would recommend it for one of those times when you want to take a date to do something different.
The Exploratorium is open Tuesday through Sunday from 10am to 5pm.
Admission is as follows:
Adult 18-64 $13
Students & Seniors $10
Disabled $10
Youth 13-17 $10
Children 4-12 $8
Children 3 and under are free.
To experience the Tactile Dome with admission, it is $17.
To learn more, you can go to www.exploratorium.org or call 415-561-0360.
A nice tip is that the museum has free admission for all on the first Wednesday of each month!