Cannonball House Close Castlehill Royal Mile Edinburgh
Cannonball House Close Castlehill, on Cannonball House can you spot the cannon ball embedded in the wall. The story is that the cannon ball was carefully placed here by engineers to mark the height above sea-level of the fresh springs which provided Edinburgh with its first piped supply of fresh water, in about 1621. The cannon ball can be seen embedded in the wall above the first-floor window in Castle Wynd North.
Opposite Cannonball House
On the opposite side where the Tartan Weaving Mill is now, was the site of a reservoir that served the well heads in the old town of Edinburgh. In 1991 the reservoir was no longer required and is now conserved as the Edinburgh Tartan Weaving Mill.