Caerlaverock Castle is a triangular moated castle dating back to the 13th century located south of Dumfries in the south west of Scotland. John de Maccuswell, deceased in 1241, was first Lord Maxwell of Caerlaverock and its proximity to the English border resulted in its being sieged several times, most notably by Edward I of England. [image source: David A G Wilson]
Interesting fact – Caerlaverock was defended vigorously though defeated. Upon surrendering it was found that only 60 men had kept the entire English army at bay for a prolonged period of time, a testament to its design.