Siberia
From Tardis Wiki, the free Doctor Who reference
Siberia was a location in Russia.
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 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)
