'Recesses' in the Bible

He came to the sheepfolds by the road, where there was a cave. Saul went into it to relieve himself. Now David and his men were sitting in the recesses of the cave.

Man puts an end to the darkness; he searches the farthest recesses for the ore in the deepest darkness.

Have you gone to the springs that fill the sea, or walked about in the recesses of the deep?