ANCIENT ORIGINS: The ancient city of Susa in Iran is a worldwide treasure (ROBIN WHITLOCK). This article, inspired by the recent naming of Susa as a UNESCO World Heritage Site, is not a bad overview of the history of the city. But it could nuance its discussion to clarify the legendary nature of the book of Daniel and of the tomb attributed to him in Susa.
More on that (traditional) Tomb of Daniel is here and here. And more on Susa (in relation to the book of Esther) is here.