This ruined castle, one of Scotland's largest, is on a promontory overlooking Loch Ness. The chief of Clan Grant owned the castle in 1509, and most of the extensive ruins date from that period. In 1692, the castle was blown up by the Grants to prevent it from becoming a Jacobite stronghold. Rising from crumbling walls, the jagged keep still remains. It's at Urquhart Castle that sightings of the Loch Ness Monster are most often reported.