Eilean Donan Castle will switch off its lights as part of conservation group WWF’s Earth Hour.
Owners of buildings and individuals across the world have been asked to turn out lights for 60 minutes from 2030 GMT on 28 March.
The Forth Rail Bridge and Edinburgh Castle are also part of the switch off.
Christ the Redeemer statue in Rio de Janeiro, the Eiffel Tower and Sydney Opera House will also be blacked out.
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