Caves inside mountains

[Michaloid]

As a player starts a new world they often have to make a house out of dirt to survive the nights and because of the pace of the game they'll be inside that dirt house for serveral (ingame) days maybe months, and they can't break stone until the you get to the smithing bronze stage, until then, you're super vunerable. And my suggetion is make horizontal caves, like inside mountains, sure it can dangerous to live in a cave, but cover the openings with dirt and you'll be good, and it makes sense. After all you're living in the stone age and aren't ready to progress, 

Edited May 15, 2021 by Michaloid

[DrEngine]

There are a lot caves inside mountains. Just find huge tall mountains (with iced top) and they'll probably have some cave inside. I've found many caves inside mountains (30 or more).

[Rhyagelle]

There are already caves inside of mountains. Some are exposed to the surfaces, others are just below or behind some rocks/dirt.