The Great Wall of Kythira
The Great Wall of Kythira is part of the extensive fortifications of the Kythiran Empire. It consists of two great walls, which in total cross four provinces: Going from the Northern Sea on the Riverlands, through the Heartlands and Camuria, ending at Wolfenstein Bay in north-eastern Alcanzar. The original Great Wall of Kythira was much smaller, and was constructed during the Second Era. Interestingly enough, whilst today the Wall is meant to protect against forces coming from the Narrow Sea in the east, it originally was focused on protecting the Kythiran coastline against Helmsdeep to the west, simultaneously forming the border between the two kingdoms.
The original wall survived the Great Grief, but was the victim of several attacks by raiders from Imperius during the early Third Era. This resulted in the wall being both massively extended, and its defenses becoming much improved, including a moat of lava.
For a brief period of time the Imperial Circle of Kythiran Architects exported blueprints for the walls to the Imperius Reich, to aid in their defenses. These walls have however been demolished in the late Third Era.