Moat Cailin

Moat Cailin is a stronghold in the Neck, consisting of a collection of ruined towers. Ruled over by the North, Moat Cailin is one of the North's most important strongholds, having been able to repel any invasion from the south for thousands of years. It commands and guards the Causeway, a safe route for armies to travel through the swamps.

Moat Cailin has not been permanently manned for centuries, with much of it now in ruins except for three watchtowers.

Moat Cailin is neither a fief nor a residence of any lord, although the Crannogmen help to defend it from southern attacks. Despite this, Moat Cailin can be easily taken from a northern attack.

History
Moat Cailin was constructed by the First Men during the Dawn Age, and, despite falling to disrepair, has since then remained an important strategic position in defending the North from invasions from the south, most notably being instrumental in preventing the Andals from conquering the North during their invasion of Westeros.