Book 2, Chapter 2
You can watch the episode here.
Summary: On their way to Omashu, Aang, Katara, and Sokka meet a group of nomads who show them a short cut through the "cave of two lovers." But when the kids become lost in the caves, they have to trust in love in order to overcome the curse and get out of the tunnels.(from avatarspirit.net)
Next post: Friday, 6/13: Return to Omashu
Okay everyone, all together now:
SECRET TUNNELLLLL~, SECRET TUNNEL! THROUGH THE MOUNTAIN, SECRET SECRET SECRET SECRET TUNNEL!
Dear god, I love Chong and the nomads. XD Best minor characters ever.