What are hanging coffins? Hanging coffins are real coffins where the deceased are placed inside. Except that instead of being buried in the ground, they are hung on cliffs. These can be found in some parts of China, Indonesia, and the Philippines.
Some are cantilevered out on wooden stakes. Some are placed in caves. And sometimes they sit on projections in the rock.
Some theorize that it puts the deceased closer to heaven. This practice was believed to have started way back in 8th century BC. But is not really practiced today. As you can guess, it would have taken a bit of work to put them up there.