Crescent Island

History
The Crescent Island is a volcanic island on the outskirts of the Fire Nation archipelago. The Fire Temple is the only structure on the island. The temple was built on the island so that it aligned with the solstices and equinoxes.

After his harrowing journey through the storm, Aang washes ashore the same crescent island where the Fire Sages once had their temple. But after Avatar Roku destroyed the temple in "Winter Solstice, Part 1" the island became uninhabited. In fact, the lava still flows from that event. The kids begin their journey into the Fire Nation from this tiny outlying island.

Fire Temple
A multi-tiered building that sits atop a craggy hill on a volcanic island. Avatar Roku once called this temple his home. The ancient temple uses mechanisms that require Firebending to operate. Only the Fire Sages live there.

Sanctuary
The sanctuary was built to receive a shaft of sunlight through a giant ruby at sundown on the winter solstice. The light illuminates the statue of Avatar Roku, making it possible to communicate with him. When Avatar Roku was alive, the previous generations of sages used the sanctuary to communicate with him on the solstice. Now, only Aang is able to communicate with Avatar Roku. The sanctuary doors protect the sanctuary from intruders. These doors can only be opened by either a fully realized Avatar or with five simultaneous fire blasts.