The New 52 Batman Wiki

The Bat-Bunker was a crime fighting headquarters personalized to Dick Grayson during his tenure as Batman. Located in the subbasement of Gotham City, the bunker was in the heart of the city and allowed Grayson easy access whenever he wanted. Although the bunker fell into disuse after Grayson returned to the role of Nightwing, Bruce Wayne set up several other bunkers as storage facilities. Most of these were exposed and bombed by Hush, though, during the Gotham Cold War.