MechaGodzilla City

After the facility building MechaGodzilla for the United Earth's forces was destroyed and abandoned, the still functional AI of the fallen robot set about rebuilding. 20,000 years later, it had built a sprawling compound capable of rearming and upgrading the United Earth forces for their showdown with Godzilla. In addition, this facility was capable of reconfiguring itself to its master's will, building tunnels and railguns out of nanometal. Ultimately, MechaGodzilla city was destroyed by Godzilla Earth in their confrontation.