There are so many castles in Scotland. These are only random samples of the castles: Blair Atholl, Inverness, Urquat, and Stirling Castle. They may not be the most beautiful or the most historically important.
Blair Castle stands in its grounds near the village of Blair Atholl in Perthshire in Scotland. It is the ancestral home of the Clan Murray, and was historically the seat of their chief, the Duke of Atholl, though the current (12th) Duke, Bruce Murray, lives in South Africa. The castle stands in Glen Garry, and commands a strategic position on the main route (now the A9 road) through the central Scottish Highlands.
Inverness Castle (Scottish Gaelic: Caisteal Inbhir Nis) sits on a cliff overlooking the River Ness, in Inverness, Scotland. The red sand stone structure evident today was built in 1836 by architect William Burn. It is built on the site of an 11th century defensive structure. Today, it houses Inverness Sheriff Court. There has been a castle at this site for many centuries. The castle itself is not open to the public but the grounds are.
Stirling Castle, located in Stirling, is one of the largest and most important castles, both historically and architecturally, in Scotland. The castle sits atop Castle Hill, an intrusive crag, which forms part of the Stirling Sill geological formation. It is surrounded on three sides by steep cliffs, giving it a strong defensive position. Its strategic location, guarding what was, until the 1890s, the farthest downstream crossing of the River Forth, has made it an important fortification from the earliest times. Most of the principal buildings of the castle date from the fifteenth and sixteenth centuries. A few structures of the fourteenth century remain, while the outer defences fronting the town date from the early eighteenth century. Several Scottish Kings and Queens have been crowned at Stirling, including Mary, Queen of Scots.
Urquhart Castle (Scottish Gaelic: Caisteal na Sròine) sits beside Loch Ness in Scotland along the A82 road, between Fort William and Inverness. It is close to the village of Drumnadrochit. Though extensively ruined, it was in its day one of the largest strongholds of medieval Scotland, and remains an impressive structure, splendidly situated on a headland overlooking Loch Ness. It is also near this castle that the majority of Nessie (Loch Ness Monster) sightings occur.