During routine maintenance on the Brooklyn Bridge late last month, city workers found a Cold War-era bunker within the masonry of the bridge. Located on the top floor of a three-floor space at the bridge’s base, the bunker contained medical supplies and food from the 1950s and 1960s meant to sustain survivors in the event of a nuclear attack.

According to the New York Department of Transportation (NYDOT), the space has historically been used for storage, but the NYDOT did not have any indication that the war supplies were there. &quotIt’s hard to believe that the space was meant to be a fallout shelter because it is not underground and light and air does get inside it,&quot a NYDOT spokesperson told the New York Times.