[delibes]

How about a pool in a rotating orbital space station? Just keep swimming forwards and slightly uphill :) Just don't lose the fake G or you could be the first person to drown in space.

[vl]

It’s never uphill though, while rotating “halo” looks like it bends upwards, force-wise it feels flat.

[nradov]

That was a plot point in the movie "Passengers".