Cave of Heroes
The Cave of Heroes is located in one of the pockets of space inside the lorekeepers dimension.
Despite the name it's not just a cave but a collection of multiple biomes inside an alcove. The cave is located in the middle surrounded by the biomes and ending with high mountainous walls.
It is believed to function as some kind of soul recycler that re-uses lost or damaged souls and circulates them back into the lands of Minearchy.
Multiple contraptions and structures can be found. They seem to have a function but not much is known about them, interaction is recommended!
There's a portal inside the cave that leads to the Fountain of Heroes.
This area is know to some as the Hub.