Siberia

Siberia was a location in Russia.

History
In the 9th century, one of the Three Custodians buried part of the remains of a Dalek in Siberia. (TV: Resolution)

In 1903, the First Doctor, Ian Chesterton, Barbara Wright and Susan Foreman visited Zarechny in Siberia, where they met Grigori Rasputin. (AUDIO: The Wanderer)

In 1908, the Dalek saucer Survey Ship Delta crashed on the wastelands of Siberia and exploded, leaving no survivors. (COMIC: The Dalek Project)

In 1927, a Vondraxian orb was found in Siberia. One person was exposed to the tachyon radiation. The KVI tried to extract the tachyons by killing him, but they dissipated after death. (PROSE: Trace Memory)

During World War II, the curator of the Palace Museum in Leningrad fled to Siberia with the collection of treasures after the invading German Army surrounded the city. (PROSE: Cabinets of Curiosities)

On 1 January 2019, part of the Dalek buried in the 9th century was activated in Siberia after another component was activated in Sheffield by ultraviolet light. (TV: Resolution)

Orphan 55 timeline
In one possible timeline where Earth was eventually designated Orphan 55, Novosibirsk was destroyed and left in ruins due to the effects of nuclear war and climate change. Tranquility Spa was built near these ruins, in former Siberia, where it was protected by an ionic membrane.

When the Thirteenth Doctor and friends visited, the spa came under attack by Dregs, and all survivors ventured out into the barren landscape beyond. It was in an underground tunnel, beneath Novosibirsk, that the Doctor realised they had been on Earth all along. (TV: Orphan 55)