The Valley of a Thousand Echoes was the secret location of the Great Convocation of Banderbears. It was called the Valley of Thousand Echoes because when the Banderbears met there, they told their stories to each other. Only two people knew the location of the Valley of a Thousand Echoes: Twig, because he was invited and lived with the Banderbears, and Rook who was also a friend of the Banderbears and who had followed his friend Wumeru there.