Related, but still 3D, these are non-euclidean 3d geometries: https://3-dimensional.space/ https://3-dimensional.space/ I like the S3 geometry, which is essent

Related, but still 3D, these are non-euclidean 3d geometries: https://3-dimensional.space/ https://3-dimensional.space/ I like the S3 geometry, which is essentially floating around on the 3d-surface of a 4d ball, also described here: https://www.mathinees-lacaniennes.net/images/stories/articles/dante.pdf https://www.mathinees-lacaniennes.net/images/stories/article...