Currently there is a small cave in the Jungle, near the bay. In it you will find the Aberratio Gems. Then there is a small one by the big river, and a passage cave at the edge of Pine Forest. But you have to find them yourself. There are no large caves at the moment. And that will take quite a while, because the focus is not on caves. Oh, there is also a construction cave, located near the waterfall in Pine Forest. ;)

Oh, at the Cave in the Jungle, you have to press a switch.

where are the terminals?

Terminals look Like windmills he says