Zoroastrian graves

Yazd is the centre of the Zoroastrian religion, the first monoteistic religion. On the edge of the city there are the Zoroastian graves (also known as "the towers of silence"): some bare hills on the top of which there were the temples used by Zoroatrians to put dead people, so that bodies could be eaten by vultures. Nowadays this method is not used anymore and only ruins remain. However it is a fascinating place.