Originally posted by Estyn:

If you've totally explored (or within 500m of) your mountain areas, then no, there will be no frost caves for you to uncover.

You'll either need to go to a different world, or use a mod to "regenerate" your mountain areas. This is what we did on our world, and it worked fine.

what do you mean a regenerate mod? i dont want to restart my world bc what i built. could you give some help to what you are talking about and thank you