Zhangjiajie in Hunan Province, China, is a world-class national park that was designated as a World Heritage site over 20 years ago.
Each year, the area is visited by hundreds of thousands of tourists, domestic and international. But sadly a huge amount of trash gets left there.
On April 4, the first day of the three-day national Qingming Festival or Tombsweeping Holiday, many tourists were fascinated by two sanitation workers picking up trash in a very special way.
From a cliff at an altitude of around 4,600 feet, they abseiled down to clean up garbage gathered at the bottom.
To promote the idea of keeping the area clean, the administration set up a huge message board where tourists can leave their fingerprints as a “like,” and to promise to stick to civilized behavior standards, no smoking, dropping trash, or carving initials.