Exploratorium Free Day: Winter Holiday 2015 Pier 15 San Francisco, CA 94111 Phone number(415) 528-4444 From: Sunday, Dec 6, 10:00 a.m.-5:00 p.m. The Exploratorium is a twenty-first-century learning laboratory, an eye-opening, always-changing, playful place to explore and tinker featuring hundreds of science, art, and human perception exhibits. Don't miss this awesome opportunity!