The Tower of Silence, a circular raised structure built by Zoroastrians for decomposing of dead bodies. They do this by exposing the dead bodies to carrion birds usually vultures. The reason for this unusual method is that they did not want the body to be exposed to the elements which are sacred in their religion. Therefore, water earth and fire are not permitted.The Tower of Silence, a circular raised structure built by Zoroastrians for decomposing of dead bodies. They do this by exposing the dead bodies to carrion birds usually vultures. The reason for this unusual method is that they did not want the body to be exposed to the elements which are sacred in their religion. Therefore, water earth and fire are not permitted.