Behemoth Buildings Benefiting from Batman's Benevolence

Earth-One's Batman later in his career used a secondary Batcave underneath the Wayne Foundation building in downtown Gotham City. Although smaller than the original subterranean base, it housed similar equipment. Eventually, after Batman quit the Justice League of America and founded the Outsiders, he housed that team in the Wayne Penthouse he had then vacated, with the Batcave becoming the team's new base until their move to the west coast. Wayne moved back to his manor and reopened his original Batcave as a result of distancing himself from his time consuming Foundation tasks.

The corresponding building on Earth-Two is the Wayne Foundation building in Metropolis, wherein that world's Batman built within its basement level a replica of his Batcave. His former partner Robin and daughter Huntress in their civilian and costumed identities used this facility when they were trapped within Superman's hometown during the Convergence event, although afterwards they relocated back to their native Gotham City.