IIRC there's another one on the Central line.

The Caxton Curve. It's the shaprest curve on the entire system,
because it follows Caxton Road above it. ...

In brief, the tracks cross over here because this single-track curve,
originally built for depot access and not as part of a running line,
was incorporated into the through line when it was extended. The
way it was aligned, it could only become part of the westbound track,
and an even sharper curve would've been needed on the eastbound if
they hadn't been allowed to swap sides instead. Originally a loop
track was used, and when the line was extended further, the tracks
were made to swap back over at a junction (which no longer is one)
north of White City.
--
Mark Brader, Toronto | "Whatever you are, be out and out,
| not divided or in doubt." -- Brand (Ibsen)

My text in this article is in the public domain.