Who:   Families with kids in-tow, couples mixing up the usual dinner and movie, and tourists marking off San Francisco staples.
What:   Massive science exploratory center in the heart of Golden Gate Park. More than just your run of the mill science center, it offers a multitude of different landscapes and activities to keep even the most distracted tyke mesmerized for hours.
Why:   With hours of educational entertainment, the question is: why not spend the day at this landmark?