Avalone was a planet.
According to one account, Melanie Bush travelled with Glitz for about six months before deciding to try to go home. On her way, she detoured to Avalone, where she worked at a holiday camp owned by Avalonian Resorts, Inc. Her progress towards Earth stalled and she resigned herself to life on Avalone. Two years after this, she chanced another run at Earth.
She hacked into computer systems to send a message to Glitz, asking her pick her up. Instead, she was "rescued" by Dr. Who and Jason, who imprisoned her in the Galactic Prison in the Land of Fiction. There, she met another prisoner, the Seventh Doctor. He, however, was a changed and considerably darker man than she had known. He revealed to her that he had manipulated her into leaving him on Iceworld because he knew what was coming (as Time's Champion) and couldn't have her as a companion. Incensed, she avoided his company and refused to travel with him in the TARDIS ever again. Ace, who was also much changed from the person that she had left behind on Iceworld, tried to calm her and explain the reasons why she and the Doctor were so much "harder" than the people she had known. Although the explanation did little to dispel her disillusionment, Mel accepted a ride from Ace. Mel thus returned to Pease Pottage in the 1990s thanks to Ace's time hopper. (PROSE: Head Games)