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Photo: Gordon Brown, CC BY-SA 2.0 via Wikimedia Commons
This is an extensive 13th-century ruin, perched over a ravine and with gardens. A seat of the Earl of Mar, it was abandoned in 1716.
Kildrummy Castle is a ruined castle near Kildrummy, in Aberdeenshire, Scotland. Though ruined, it is one of the most extensive castles dating from the 13th century to survive in eastern Scotland, and was the seat of the Earls of Mar. It is owned today by Historic Environment Scotland and is open to the public as a scheduled monument with gardens that are included in the Inventory of Gardens and Designed Landscapes in Scotland.
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"2090" means in feet, it's only 645 metres altitude at base, with the hills above rising to 775 m. So it's a beginners' resort with 12 lifts including a "magic carpet" for wobbly novices, half a dozen short runs on the shady side west of the road, and one even shorter run on the sunny east slope. There are mountain bike trails here in summer.
Mid-16th-century tower house castle with reconstructed 1750 redcoat barracks. Access is by a steep track, wear boots.
Prince Albert, Queen Victoria's husband, bought this land and built a grandiloquent pile of a castle, the prototype of the Scottish Baronial style, all mock-turrets and stags heads looming over the stairways. Completed in 1856, it remains the Royal Family's summer holiday home. The standard tour only includes one room within the castle, the ballroom, plus the stables and gardens. A much pricier guided tour goes further. The king is usually resident late Aug and Sept, so there's no access then.