Sir Nigel replied to What is the name of the mod that adds frost caves to existing mountain biomes? March 12, 2022 @ 11:45:54 pm PST
Yes, there is a mod called Upgrade World.
https://www.nexusmods.com/valheim/mods/1485
You won't need to re-explore.
https://www.nexusmods.com/valheim/mods/1485
You won't need to re-explore.
9:13 am, March 13, 2022