Edinburgh Castle is to join landmarks from around the world in switching off its lights at 8.30pm on 29th March, as part of Earth Hour.
The castle is one of a number of global landmarks – including the Eiffel Tower, Empire State Building and Sydney Opera House – to taking part in Earth Hour, a WWF event which sees individuals, communities, cities and landmarks around the world switch off their lights simultaneously to show their support for action on climate change.
As well as the castle, other Historic Scotland sites taking part are Linlithgow Palace, Urquhart Castle, Stirling Castle, Castle Campbell, Dundonald Castle, Ruthven Barracks and Arbroath Abbey.
As in previous year, the Scottish Parliament, the Scott Monument, and Forth Rail Bridge will also be going dark.
Launched in Australia in 2007, this year's Earth Hour is expected to see 154 countries taking part.
“WWF’s Earth Hour is a simple way to show support for protecting our brilliant planet by tackling climate change," said Lang Banks, Director of WWF Scotland.
You can follow it on social media via the #bebrilliant hashtag. "Earth Hour is our planet’s time to shine - we hope everyone will feel inspired to join us in a dazzling display of support by signing up today,” said Banks.