Up in the hills of the Marin Headlands, atop the vast oceans lies a structure steeped with history, Battery Townsley at Fort Cronkhite. Artists explore concepts of water using the extreme resonant spaces to amplify sounds. Artist Danishta Rivero uses her invented instrument the Hydrophonium to create sonic atmospheric improvisations. Sound artist Krys Bobrowski conducts a symphonic experience with her Gliss Glass, a water instrument of her own design that is drained and filled while played. Artist Zachary James Watkins composes a water performance that will reverberate through the tunnels of the fortification.