Bortresoye

Bortresoye was a planet located in the Divergent Universe. The planet was divided into a number of zones, with each zone containing vastly different environments and cultures. The borders and spaces between the zones were occupied by the Interzone, and transit between the zones was carefully controlled by the Kro'ka. Some of the zones were fully aware of adjacent zones, while others were oblivious to their existence. (AUDIO: Scherzo, The Creed of the Kromon, The Next Life)

The Eighth Doctor and Charlotte Pollard arrived here when they were banished to the Divergent Universe, and spent many weeks crossing from zone to zone. (AUDIO: the Divergent Universe arc)

Some of the zones included:
 * Eutermes - a zone inhabited by peaceful and trusting Eutermesans. The Eighth Doctor's companion C'rizz was from here.
 * an unnamed zone of deserts, containing many species, controlled by the Kromon. (AUDIO: The Creed of the Kromon)
 * Light City - the zone of a short-lived species that practised frequent revision of its citizens' memories and personalities. (AUDIO: The Natural History of Fear)
 * a zone taken from the planet ?, which contained jungles and a sentient cave. (AUDIO: The Twilight Kingdom)
 * The Multihaven - a zone with hundreds of established religions, all occupying a vast city devoted to religious study. (AUDIO: Faith Stealer)