We found the tunnel ceiling collapsed in many places, our way blocked by immense boulders that took us several cycles to move.

As the craft moves on, it enters a region of immense boulders, probably limestone.

After struggling, aching labor, an opening to where he lay, all but crushed by an immense boulder that pinned his body from chest to feet.

The other end of the cavern was sealed with immense boulders that, for some reason, looked familiar to him.

Doug Titus uses his backhoe to drop an immense boulder into place.

She glanced up and saw Elizabeth disappearing behind an immense boulder.

It was more a jumble of immense boulders than a true cave, but there was water.

He lugged an immense boulder waist-high and staggered to the top of the inclined rise.

Far from being a tiny puff, it was an immense boulder of material, white at the top and with a flat gray bottom.

This sheltered section then gives way to a more open area with a rock garden where large ferns cascade out of immense boulders.