Buildings in the Highlands and islands are joining landmarks from around the world in switching off lights to raise awareness of climate change.
Urquhart Castle near Loch Ness and Stornoway War Memorial will both be plunged into darkness for one hour on Saturday, March 29 at 8.30pm for Earth Hour.
They join global landmarks – including the Eiffel Tower, Empire State Building and Sydney Opera House – taking part in raising awareness for the World Wildlife Fund.
Urquhart Castle is one of a number of Historic Scotland attractions which will be turning off the lights, while the Western Isles Council will be plunging the war memorial just outside Stornoway into darkness simultaneously.
Susan Loch, head of visitor operations for Historic Scotland said: “A grass-roots movement which has grown into a global phenomenon in just a few years, Earth Hour does a wonderful job of highlighting the problem of climate change.
“I am delighted that we will once again be supporting this worthwhile cause.”
Councillor Angus Campbell, Western Isles Council leader, said: “Our decision to participate in the WWF’s Earth Hour highlights our continued commitment to the issue of climate change and demonstrates to others around the world that Scotland continues to take action to address climate change.
“I would encourage businesses and organisations in the Western Isles to switch off for an hour to show their own support for Earth Hour.”