Thirty kilometers east of Kermanshah lies Bisotun Mountain. In Bisotun and nearby mountains you can see traces of human endeavor to record the history of a nation. The site contains about 2000 culturally significant monuments from
prehistoric times to llKhan period. Examples include a Median temple, a Median city, a Sassanid city and Safavid caravanserai etc.The most important monument of the site, however , is an achaemenid bas-relief depicting Darius The Great and a group of rebels.
Under the bas-relief, there is a large inscription dating back to 520 BC. The inscription ,which is one of the world’s most famous and reliable historical documents, is a narration of historical events during the reign of Darius I as well as the names of Iran’s neighboring countries and geographical regions of the time in three ancient languages. The rectangular cuneiform inscription is 21 meters long and 8 meters wide. This was the first cuneiform inscription to be translated to modern languages.