One of the Coolest Places Ever

I first visited the Exploratorium in San Francisco when I was in 5th grade.  It was off the touristy path a little bit, over in the Palace of Fine Arts.  It's just finished a move to new digs, where even more people will get a chance to become enthralled:

We’re back! The Exploratorium is now open in our spectacular new home at Pier 15 on San Francisco’s Embarcadero. What’s to see? There are 150 new exhibits—indoors and out—plus hundreds of beloved classics, a Bay Observatory, a bigger focus on tinkering and social science, and much, much more. Come explore.