old-growth forest
primeval forest
primary forest
late seral forest
virgin forest
ancient woodland BrE

On many places there are primeval forests being left to its own resources.

Both forests were once parts of the same primeval forest.

The ocean was sliding away under them and soon they were above the primeval forest.

It's the silence of the primeval forest, heavy with threats.

The Polish primeval forest could be a good flagship project.

The primeval forest has closed in again all around.

The primeval forest was gone from between her legs.

Why does this show end in the pretty, primeval forest, where time and change don't exist?

He was in a primeval forest with huge trees.

As I knelt there in that primeval forest, the knowledge made me sick.

The overall effect was of a circus being performed in a primeval forest.

These stands, he knew, had never been logged; this was the primeval forest.

The first two books takes place somewhere in the primeval forests of Europe near a huge volcano.

The park has an extensive area of primeval forests.

What was once primeval forest has become a wasteland.

It was the sculptures: bison resting in the primeval forest.

Trips through this primeval forest are full of peril.

Thora observed that she had not landed in the middle of the primeval forest.

He was owner of 12 cities, 257 villages, 17 palaces and two primeval forests.

Off the beaten track, you'll steep yourself in the atmosphere of a truly primeval forest.

The sun had set in the west behind the wall of the primeval forest and the rain had ceased.

True, those ancestors lived just above the animals, in primeval forests of Old Earth.

This primeval forest has stood, unchanged and unchallenged, for more than sixty million years.

We seemed to be on the edge of some primeval forest that doubtless stretched far inland.

There is reason to believe that five hundred years previous to this historian's time, before the primeval forests were cut, the lake was still larger.