Earth Hour: See the world's most famous landmarks in darkness

Buckingham Palace switched off all illuminations which usually dapple the building in colourful lights.

Landmarks all over the world have were temporarily plunged into darkness on Saturday evening to mark Earth Hour.

In London, Buckingham Palace, Big Ben and Piccadilly Circus all turned off non-essential lights at 20:30 as part of the environmental awareness campaign.

Earth Hour is organised by the World Wide Fund for Nature and it encourages people to turn off their lights for 60 minutes to raise awareness of environmental issues.

It's the biggest global switch off of its kind.

The organisers, which include wildlife charity WWF, say they want to draw attention to the climate crisis and the damage being done to the natural world.

Now, more than 190 countries take part in switch-off events and activities, to show their support for protecting our planet.

Let's take a look at some of the landmarks that took part.

The world famous Eiffel Tower in France's capital Paris, which is usually a twinkling spectacle at night, was only signified by the beacon at the top.

In the German city of Cologne, the stunning gothic cathedral went dark in support of the cause.

Often named "The city that never sleeps", New York's Empire State Building took it's own 'power nap' and switched off the lights for 60 minutes.

The world's tallest building, the Burj Khalifa in Dubai, was dealuminated during the hour.

Down under, the Sydney Opera House in Australia switched off the lights of it's iconic sail-like roof, in support of the cause.