Boston is a capital city in the state of Massachusetts and is one of the largest cities in the United States of America.
After Ghidorah has awakened Titans around the world and command them all to terraform the planet to his liking, Madison Russell uses the ORCA to lure all of them to Boston. An infuriated Ghidorah arrives to kill Madison, who was hiding in the press box at Fenway Park, only to be stopped by Godzilla and Mothra. After a lengthy battle with Rodan, Mothra sacrifices herself to protect Godzilla, which allows Godzilla to absorb her life force and enters a burning form to kill Ghidorah (and collaterally, level a large part of Boston) with a series of thermonuclear pulses. Rodan, Behemoth, Methuselah, Scylla, and the Queen MUTO arrive just in time to witness Ghidorah’s death and bow to Godzilla as their new Alpha.