Edinburgh Castle

And yet again, it's Ian. Today I'm going to talk about Edinburgh Castle. First of all, it is the home of the Scottish Crown Jewels. Apparently, there are indications of the castle being as old as second century AD. The location makes the castle nearly impregnable, but at the same time the basalt it is built on does not allow much water through, and providing water to the upper wards has always been problematic. This is especially a problem under siege conditions. The castle is also the home of Mons Meg, a six ton siege cannon.