Riddles in the Dark is the twenty-first soundtrack of The Hobbit: An Unexpected Journey.
It is the music playing during the Riddles scene in The Hobbit (Bilbo and Gollum).
Riddle 1: What has roots as nobody sees, Is taller than trees, Up, up it goes, And yet never grows?
Answer: a Mountain
Thirty white horses on a red hill, First they champ, Then they stamp, Then they stand still.