I mean, it’s also time travel, not location travel, so I’d be most likely to end up in space and die almost instantly.
Depends what reference frame you’re using. If you’re following an inertial frame backwards through time you’re most likely to end up deep inside the Earth, actually, because that would put you in a sort of orbit.
It’s not. The good news is it’s sucking you in like a high pressure opening doesn’t, and at least your end isn’t falling, so that’s probably not how the magic works.
The other trope-based possibility is it leaves you roughly where you geographically are in your new era. That’s limiting as hell if you’re somewhere with a short history like I am, which I guess is another argument to go recent.