CALM YOUR TITS TUMBLR, THIS IS A FAKE. No need for the salt yet.
The image is photoshopped, the original is here: [x]
So yes, there is such thing as a tower of silence in zoroastrianism, but it is just some sort of burial ground. No pits of blood, no delirium, no vanishment of bodies the next day. Just a big creepy grave.
The story is from a CreepyPasta thread on 3chan.
So sleep well, nothing to see here. (cool story though.)