The spaceship top part of the BFR should end up with the widest interior volume of any spacecraft ever. Wider even than Skylab - which for me was the one and only time the inside of a spacecraft looked in part like science fiction told us it would look. Big and clean with lots of room for floating about. By comparison the ISS looks like a cluttered high tech hallway.
“By comparison the ISS looks like a cluttered high tech hallway. “
Or Mir that looked like a Sci Fi getto.