20 Earth Hour Photos That Capture Iconic World Landmarks

IMAGE DISTRIBUTED FOR WWF/EARTH HOUR GLOBAL - Combination photos. The Macau skyline can be seen before (top) and after (below) the population of the city observed Earth Hour on Saturday, March 23, 2013. Earth Hour Global is a worldwide event organized by the World Wide Fund for Nature (WWF) encouraging households and businesses to turn off their non-essential lights for one hour to raise awareness about the need to take action on climate change. The event is designed to highlight the impact climate change is having on people and nature. Millions of people in more than 150 countries are expected to take part. Earth Hour 2013 is being held on March 23, 2013 from 8:30 p.m. to 9:30 p.m. during participants' local time. (AP Images for WWF/Earth Hour Global)

You've seen them in the daylight, on pictures, and even lit up at night, but how do the world's iconic landmarks look in the dark?

Well, come this Saturday, you can find out for yourself. March 29 marks Earth Hour, the annual global event that promotes us working towards a more sustainable future. Across 7,000 cities around the world, millions of people will turn off their lights from 8:30 p.m. to 9:30 p.m. and cut back on their overall electricity usage, according to CTV.

But it won't just be homes and businesses participating. From Albania to Vietnam, each nation's famous landmarks will also go dark for one hour. In total, 150 countries are expected to participate, a significant jump from Australia — the only country to take part in 2007.

And while these landmarks may go dark, fret not. Your photos can still turn out awesome, as evident by these pictures from past Earth Hours. Check them out below: