It looks like you’re quoting the title of Billie Eilish’s debut album, WHEN WE ALL FALL ASLEEP, WHERE DO WE GO? released in 2019. It’s a critically acclaimed album that explores themes of dreams, fears, and the subconscious. If you’re asking literally where we go when we fall asleep, scientifically speaking: when we fall asleep, our brain shifts through different stages of sleep, including REM (rapid eye movement) sleep, which is associated with dreaming. During this time, our body rests and our mind processes memories and emotions, but we don’t physically go anywhere — rather, it’s a complex internal experience. Would you like to know more about the album or about the science of sleep and dreaming?