File photo by DEBORAH CANNON/American-Statesman

The documentary series about the history, science and culture of Barton Springs will host a public screening featuring short videos, including “Lifeguards,” a playful behind-the-scenes look at the job of the men and women in red, and “The Reflecting Pool,” which recounts the springs from 1912-1962. Gather before dusk near the big tree at the south entrance; the screening will begin when it’s completely dark.

After the screening, jump into Barton Springs for a full moon swim.

Details: 8:40 p.m. Tuesday. Free. Barton Springs, 2201 Barton Springs Road.