For there are caverns deep and dread, By deer and wild birds tenanted, And hills with many a dark abyss, Grotto and rock and precipice. There bright Gandharvas love to dwell, And Kinnars in each bosky dell.

In plain words: Lakshmana describes the land: deep caves, cliffs and dark pits, home to animals and to heavenly beings like Gandharvas (celestial musicians) and Kinnaras (forest spirits).