I didn't know this at all, first I heard about it. I knew about the Parsi Towers of Silence, but this came as a surprise. In effect, you lay the body out in the open, let the vultures feed on the dead body based upon Buddhist rituals. The argument behind disposing of bodies in this fashion is pretty interesting and completely makes sense. But for sensitive souls for whom death is a very civilised affair, this can be shocking.
Here’s a site with some very graphic images, viewer discretion is very strongly advised.