Dimensional Doors Mod (1.18.2, 1.7.1) adds several types “Dimensional” Doors that allow for teleportation and extradimensional pocket dungeons. These doors can be used to access teleportation. They can also provide access to teleportation.
Enjoy exploring the world, but remember to be cautious about falling into the Void or dying. You don’t want to end your life in the Limbo dimension.