https://elevation.fsdf.org.au/restore/5cd19bc5-5386-4831-b2c7-bd46e24389b5
The fantasy 1830 version of such, anyway. Lord Howe Island is an extinct shield cone – much smaller than it used to be. Natural place for an evil villain lair.
Dungeon23 Location
Idea to make this in pyvista like this :-
https://github.com/giswqs/leafmap/issues/212
The above site has point clouds and also .asc rasters so you can approach it either way – lot less RAM involved with the latter.