Edinburgh

Edinburgh was the capital city of Scotland. The city was home to Dolerite Base, a secret facility used extensively by HAVOC. (PROSE: Moon Blink et al)

The East Coast Line had a station at Edinburgh. (PROSE: Enter Wildthyme)

History
The Tenth Doctor and Martha Jones visited Edinburgh in 1759, where they met Alexander Monro and prevented the Kith from killing everyone in the city. (PROSE: The Many Hands)

In 1816, Dr John Polidori, Lord Byron's physician, was considered one of the best doctors in Edinburgh. (AUDIO: Mary's Story)

The Sixth Doctor and Evelyn Smythe visited Edinburgh in December 1828. (AUDIO: Medical Purposes)

The Tenth Doctor's companion, Heather McCrimmon, was from Edinburgh and studied at the city's university in 2009. (COMIC: The Chromosome Connection)

The Tenth Doctor later visited Edinburgh in 2010, where he had his final battle with the Mozhtratta. (COMIC: Dead-line)

Alternate timeline
In an alternative timeline, the Fifth Doctor, Peri Brown and Erimem visited the city on 31 December 1999. (PROSE: Graham Dilley Saves the World)