- You may be looking for the otherworldly domain.
Mount Olympus was a mountain in Greece. Some believed it to be the abode of the Olympian gods, but Hermes told Alistair Gordon Lethbridge-Stewart that the mountaintop was only the site of an interdimensional portal; those with the right skills could pass through it to reach the gods' true Olympus, which was "not exactly a parallel universe, but an alternative world of transdimensional locations." When Zeus retired from interacting with humans, he ascended through the portal. (PROSE: Deadly Reunion)
When Gesima Cazalet scornfully observed Leela's impetuousness, the Fourth Doctor joked that Leela was like this because she was raised on the slopes of Mount Olympus by a troop of itinerant Girl Guides. (AUDIO: Night of the Stormcrow)