Nashlostan: The four rocky tombs here are buried in the great four emperors of Persia's history, Artaxerxes (form 465-423 BC), Xerxes (formerly 485-front) 465 years), Darius I (formerly 521-485) and Darius II (front 425-405). The tombs of these Achaemenid monarchs have the same external engraving style, shaped like a cross, but were born more than 480 years before Christ. Each tomb is 22.93 meters high and 19 meters wide. The grave is so high, from that era, people believe that the closer to the sky, the closer it is to the God.