"To Gundabad", Legolas answered the youngest she-elf, before seeking out two horses. Helping Yavanna board the first horse, he boarded on right after her, just sitting in front. Knowing that Tauriel will follow with the second horse, he took charge, having to ride past a few of the common people. 

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[i]Sickness?[/i], this was the only word that made Saeril think of one thing: dragon sickness; gold lust. This was bad, and she only hoped that this wasn't what Bilbo was referring to. As the Hobbit went on, nobody noticed Fili looking over his shoulder, but the she-elf was quick to notice him running away, down the stairs. "Fili, wait!", she called to him, already dreading what he will be witnessing from their king, and her friend. 

Going down the stone, spiral staircase, Fili gazed in astonishment at what was before him: mountains and mountains of golden treasure all over the room, covering the floor, and up to the stairs. Gaping at the great load, Fili did not move from his spot when he got there. The tales were true...

Following Fili to the treasure hoard at the top of the stairwell, all the she-elf could do was gaze in shock at the mountain's enormous wealth. "The great treasure of Durin", she breathed out.