Did you know that one of the coolest nighttime activities to do in San Francisco in 100 percent free? Since 2013, the cables of the Bay Bridge have been adorned with a twinkling LED light display that shoots up and down the cables from sunset until sunrise. Designed by Leo Villareal, one of the world's leading light artists, the art installation delights tourists and locals alike every day on the week. Usually, the light show only runs for a few hours, but TONIGHT the light show will go on for 14 HOURS in honor of the winter solstice! You'll be able to see the bridge twinkle from 14:54 tonight (very specific, we know) until around 7:20 tomorrow morning. Go stand on the Embarcadero, find a good spot to see the bridge, and check it out!