Super Sons #10 Page 12. Fortress of Attitude.

From HA: Batman and Robin (Damian Wayne) embark on a father-son trip beneath the sea as Bruce reveals the underwater headquarters he and Superman built for their Super Sons. It's a rare moment of camaraderie and everyday parent-child interaction between the two, who are more often occupied with superheroics -- or clashing with each other -- than sharing genuine bonding time. Plus, the first panel features a fantastic shot of the Batmobile cruising underwater!