How do you get into Scotland yard?

Scotland Yard is a place in London, England. The name dates from a time (before 1707) when Scotland and England were still separate countries each with their own king, court and government. As a result the Scottish kings kept their own embassy in London, just as they did in any other foreign country, with their own ambassadors and representatives. The English king granted them an area for their embassy. This area which they inhabited in London was known as "Scotland Yard".

In Victorian times the building which was erected on the same spot was known as Scotland Yard and it was occupied by the police force. Soon the name "Scotland Yard" became synonymous with the Metropolitan Police force.

Nowadays a new office has been erected on the same place, again occupied by the police, but known as "New Scotland Yard"

I believe that the building of New Scotland Yard is not open to the public. The Metropolitan Police force who occupy New Scotland Yard do have a collection of crime-related ephemera but this is housed in another part of London.