The sunken cities

That's true, but Zealandia would be the world's largest microcontinent and links Aotearoa with New Caledonia and Rēkohu. Its topography is super cool and makes for a neat range for deep-sea, benthic organisms.

See also: the Tonga–Kermadec Ridge to the northeast, which imo looks sick.

There's only one continent if you ignore water.

Then the Dutch drained it, built the Deltaworks, and now we live in purgatory

https://en.wikipedia.org/wiki/Zeeland

Looks like it but reversed

I remember going down there too early and not knowing what to do.

Here's an example:

Limb of the victim of a curse.
Temporary curse allows engagement with ghosts. The only way to fight back against ghosts, who are cursed beings, is to become cursed oneself.
The safest method, however dreadful, is to cut off an arm of the dead.