Urquhart Castle sits beside Loch Ness in the Highlands of Scotland, between Fort William and Inverness. Though extensively ruined, it was in its day one of the largest strongholds of medieval Scotland. It is near this castle that the majority of Nessie (Loch Ness Monster) sightings occur.
Crannog is an artificial island, usually originally built in lakes, rivers and estuarine waters, and most often used as an island settlement or dwelling place in prehistoric or medieval times. The name itself may refer to a wooden platform erected on shallow floors, but few remains of this sort have been found.