In the time that Eeran was the Piper of the Aurons, a group of dissenting Aurons who wanted to live in the real world were expelled from the Isle of Auron. They made wooden rafts, lashed together with seaweed, that could be anchored to the cavern floor or moved around as needed. The entire raft-dwelling Auron population lived in mud-brick houses on this platform of floating rafts.
Doran visited the rafts at some point after they were made and brought fire to the Aurons.
Lief, Barda, and Jasmine came to the rafts on their quest for the stem of the Pirran Pipe and stayed with Penn, the Auron history-keeper. Penn showed them the enchanted Isle of Auron and gave them the history of the rafts so they could understand why the raft-dwelling Aurons lived as they did. After the destruction of the magic dome, the companions returned to the rafts, where the Piper of Auron gave them the stem of the Pirran Pipe.