Castles & palaces
Carolside
Country house in the Scottish Borders, UK
Wikipedia names Carolside as where 1 film or series was filmed; its page links to the sentence that says so. Wikidata records no shoot here yet.

Filmed here, per Wikipedia
Wikipedia says these were filmed in Carolside. Each title’s page links to the sentence that says so.
Filming locations nearby
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Streets & squares
Leaderfoot Viaduct
Scotland · 5 km south
Railway viaduct near Melrose, Scottish Borders
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Landmarks & buildings
Paton Street drill hall, Galashiels
Scotland · 8 km south-west
Military installation in Galashiels, Scotland
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Towns & cities
Selkirk
Scotland · 16 km south-west
Town in Scottish Borders, Scotland, UK
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Castles & palaces
Floors Castle
Scotland · 16 km east
Country house in Roxburghshire, south-east Scotland
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Towns & cities
Kelso
Scotland · 17 km east
Town in the Scottish Borders, Scotland, UK
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Towns & cities
Duns
Scotland · 26 km north-east
Town in Berwickshire, Scotland, UK