When was The Nor Loch created –
King James II ordered the area flooded in 1460 deepening the lake to heighten defenses, sacrificing the castle gardens in the process.
The Nor Loch’s purpose –
Primarily created as a defense against the English The Nor Loch was also a common spot for suicide and a well known smuggling route. Up until it’s outlaw in 1685 it was used for executions by form of drowning.
Where is the Nor Loch today –
Draining began to allow construction of the North Bridge and in 1813-1820 continued to allow construction of Princes Street Gardens. The area is now occupied by Princes Street Gardens and Waverly Station – you may have exited here if you travelled by train.