Edinburgh

Edinburgh is a city on Earth in the nation-state of Scotland.

History and specifics
In the year 1986, Montgomery Scott told Doctor Marcus Nichols that he was a professor who had come from Edinburgh for the express purpose of touring Plexicorp. He claimed that the city was located millions (rather than thousands) of miles from San Francisco before being corrected by Leonard McCoy. 

The Caldos colony was patterned after Scotland and aimed to recreate the country as accurately as possible. As such, several of the cornerstones of buildings had been transported from locations such as Edinburgh.